2021 Audi A4 Review: Still Worth It?

The 2021 Audi A4 is a refined compact luxury sedan that received significant updates including a 12-volt mild-hybrid system adding 13 horsepower to both engine options (bringing the 40 TFSI to 201 hp and 45 TFSI to 261 hp), plus standard quattro all-wheel drive across the entire lineup with the front-wheel-drive model discontinued^[1]. Starting at $39,100 when new, the 2021 A4 delivers exceptional interior quality with soft leather upholstery, advanced technology including wireless Apple CarPlay (new for 2021), and impressive performance with the 45 TFSI achieving 0-60 mph in just 4.8 seconds according to Car and Driver testing—significantly quicker than Audi’s 5.2-second claim^[2]. In October 2025, used 2021 A4 models sell for $22,000-$28,000, representing $13,000-$17,000 in depreciation and offering excellent value as certified pre-owned purchases, though buyers should be aware of average predicted reliability (74/100 J.D. Power score), premium fuel requirements, and known issues including infotainment glitches and sensor malfunctions^[3].

2021 Audi A4 Overview

What’s New for 2021

The 2021 model year brought the most significant changes to the A4 since its B9 generation debut^[1].

Major updates include:

• 12-volt mild-hybrid system standard on both engines adding 13 hp
• Standard quattro AWD across entire lineup (FWD model discontinued)
• Wireless Apple CarPlay now standard (previously wired only)
• Lane-departure warning made standard equipment
• Integrated toll transponder included for convenience
• Premium Plus gains adaptive cruise control with Traffic Jam Assist
• 360-degree camera added to Premium Plus standard equipment
• Enhanced packages with more features at each trim level

The mild-hybrid system utilizes a belt-starter-generator enabling smoother stop-start operation and brief electric boost during acceleration. Understanding the car purchase timeline helps prospective buyers plan appropriately when shopping for a used 2021 A4^[1].

Key Specifications at a Glance

Specification	40 TFSI	45 TFSI
Engine	2.0L turbo 4-cyl + mild-hybrid	2.0L turbo 4-cyl + mild-hybrid
Horsepower	201 hp	261 hp
Torque	236 lb-ft	273 lb-ft
0-60 mph	6.3 seconds	4.8 seconds (tested)
Transmission	7-speed dual-clutch auto	7-speed dual-clutch auto
Drivetrain	Quattro AWD (standard)	Quattro AWD (standard)
Fuel Economy	28 mpg combined	27 mpg combined
Starting MSRP	$39,100	$40,900
Curb Weight	3,417 lbs	3,627 lbs
Cargo Capacity	12 cubic feet	12 cubic feet

The 45 TFSI’s tested 4.8-second 0-60 time significantly outperforms Audi’s conservative 5.2-second claim and beats many competitors^[2].

Who Should Consider the 2021 A4

According to Autvex automotive experts, the 2021 A4 makes the most sense for specific buyer profiles.

Ideal buyers include:

• Refinement-focused buyers prioritizing comfort over BMW 3 Series sportiness
• Tech enthusiasts wanting Virtual Cockpit Plus digital gauges
• All-weather drivers requiring standard quattro AWD capability
• Northern climate residents needing confidence-inspiring traction
• Comfort commuters prioritizing smooth daily driving experience
• Quality-conscious buyers valuing exceptional interior materials
• Balanced performance seekers wanting adequate power with efficiency

Exterior Design and Styling

Design Philosophy and Proportions

The 2021 A4 embodies Audi’s design language emphasizing understated sophistication^[1].

Design elements:

• Clean, simplistic lines prioritizing timeless elegance over trendy aggression
• Understated elegance appealing to wider audience versus polarizing designs
• Classic three-box sedan proportions with balanced visual weight
• Singleframe grille with horizontal chrome bars creating width illusion
• Sculpted character lines along sides adding subtle muscularity
• Fastback-style rear deck and trunklid for dynamic profile
• Dimensions: 187.5″ L × 72.7″ W × 56.2″ H with 111.0″ wheelbase

Lighting Technology

Advanced LED lighting comes standard across all 2021 A4 models^[1]:

• Standard LED headlights with distinctive daytime running light signature
• Optional Matrix LED headlights (Prestige trim) with adaptive patterns
• LED taillights with dynamic sequential turn signals
• Automatic high-beam assist enhancing nighttime safety
• Cornering lights illuminating turns for enhanced visibility

Available Exterior Colors

Eleven exterior colors available for 2021^[1]:

• Brilliant Black
• Ibis White
• Florett Silver Metallic
• Glacier White Metallic
• Manhattan Gray Metallic
• Mythos Black Metallic
• Navarra Blue Metallic
• Terra Gray Metallic
• Turbo Blue (45 TFSI/S line exclusive)
• Tango Red Metallic (45 TFSI/S line exclusive)
• Daytona Gray Pearl Effect (45 TFSI/S line exclusive)

Wheel Options and Packages

Wheel configurations vary by trim level^[1]:

• Standard 17-inch alloy wheels (40 TFSI Premium)
• Standard 18-inch wheels (45 TFSI/S line models)
• Optional 19-inch wheels with sport-tuned suspension
• Black Optic package (45 TFSI): gloss black wheels and exterior trim
• S line exterior package enhancing sporty visual appeal

Design Comparison to BMW 3 Series

The A4’s design philosophy contrasts with its primary German rival^[4]:

• More understated versus BMW’s enlarged controversial kidney grilles
• Smoother, cleaner lines versus BMW’s sharper, more angular creases
• Less polarizing styling with broader appeal across demographics
• Similar overall dimensions with slightly lower roofline
• More refined appearance than Mercedes C-Class’s busy surfaces

Turbocharged 2.0L Engine and Performance

40 TFSI Engine Architecture

The base engine delivers adequate performance for most buyers^[1].

Engine specifications:

• 2.0L turbocharged inline-4 with direct injection
• 12V mild-hybrid system with belt-starter-generator
• 201 horsepower output (13 hp increase from 2020)
• 236 lb-ft torque from 1,600-4,500 rpm
• 7-speed dual-clutch automatic transmission
• Standard quattro AWD distributing power intelligently
• 0-60 mph in 6.3 seconds (manufacturer claim)

45 TFSI Engine Architecture

The upgraded engine transforms the A4’s character significantly^[2].

Enhanced specifications:

• Same 2.0L turbo base with enhanced tuning
• 261 horsepower (13 hp gain from mild-hybrid)
• 273 lb-ft torque from 1,600-5,200 rpm (broader powerband)
• 12V mild-hybrid providing subtle boost assistance
• Rear-biased quattro torque distribution for dynamics
• Sport-tuned suspension standard with 45 TFSI
• 0-60 mph in 4.8 seconds (Car and Driver tested)

Acceleration and Speed Performance

Performance figures reveal the 45 TFSI’s impressive capabilities^[2]:

• 40 TFSI: 0-60 mph in 6.3 seconds (adequate but unremarkable)
• 45 TFSI: 0-60 mph in 4.8 seconds (Car and Driver tested)
• 45 TFSI: 5.2 seconds (Audi’s conservative official claim)
• Quarter-mile: 13.5 seconds @ 102 mph (45 TFSI)
• Top speed: 126-130 mph electronically limited
• No launch control (dual-clutch transmission protection)
• Smooth, linear acceleration feel without harshness

The 45 TFSI’s tested 4.8-second time beats the BMW 330i’s 5.3 seconds and Mercedes C300’s 5.7 seconds^[2].

Driving Dynamics and Handling

The A4 prioritizes comfort over ultimate sportiness^[4]:

• Comfortable, composed ride quality in all conditions
• Not as agile or sporty as BMW 3 Series
• Balanced handling with predictable, confidence-inspiring limits
• Quattro AWD provides excellent grip year-round
• Precise steering but lacking BMW’s ultimate feedback
• Minimal body roll with optional sport suspension
• Best suited for comfortable highway cruising
• Optional sport suspension firms up ride noticeably

Real-World Driving Experience

Daily driving reveals the A4’s refined character^[1]:

• Exceptionally refined and quiet at highway speeds
• Smooth power delivery with minimal noticeable turbo lag
• Seamless shifts from dual-clutch transmission
• Confidence-inspiring quattro AWD in rain and snow
• Grand tourer character versus sports sedan aggression
• Excellent brake feel and consistent stopping power
• Comfortable for extended long-distance driving

Fuel Economy and Efficiency

EPA Fuel Economy Ratings

The mild-hybrid system provides modest efficiency improvements^[1].

Engine	City	Highway	Combined
40 TFSI	25 mpg	34 mpg	28 mpg
45 TFSI	24 mpg	31 mpg	27 mpg

Additional specs:

• Fuel tank capacity: 15.3 gallons
• Estimated range: 383-520 miles depending on engine and driving
• Premium unleaded required: 91+ octane (adds ongoing expense)

Real-World Fuel Consumption

Testing reveals achievable real-world efficiency^[2]:

• Highway efficiency: 33 mpg at steady 75 mph (Car and Driver)
• City driving: 22-25 mpg typical with stop-and-go traffic
• Combined real-world: 26-29 mpg achievable with mixed driving
• Mild-hybrid impact: Minimal noticeable improvement versus conventional
• Spirited driving: Efficiency drops to low 20s quickly
• Quattro AWD penalty: Slight versus front-drive competitors

Fuel Economy vs Competitors

The A4 competes well within its segment^[4]:

• Better than BMW 330i: 26 city / 36 highway (A4 more efficient city)
• Similar to Mercedes C300: 24 city / 35 highway (nearly identical)
• Worse than Genesis G70 2.0T: 22 city / 32 highway (surprisingly)
• Competitive overall within compact luxury sedan class
• Premium fuel requirement increases operating costs $200-$300 yearly

Cost of Ownership Fuel Considerations

Fuel expenses represent significant ongoing costs^[3]:

• Annual fuel cost: $2,000-$2,500 assuming 15,000 miles yearly
• Premium fuel premium: Additional $200-$300 annually versus regular
• Better than larger sedans: A6, A8 consume significantly more
• Mild-hybrid savings: Modest $50-$100 annually estimated

Interior Quality and Comfort

Cabin Materials and Build Quality

The 2021 A4’s interior represents one of its greatest strengths^[1].

Interior highlights:

• Exceptional build quality with perfect panel fit and tight shutlines
• Soft leather upholstery standard across all trims (not leatherette)
• Aluminum trim accents throughout cabin adding premium feel
• High-quality plastics with soft-touch surfaces on most touchpoints
• Handsome interior design praised universally by reviewers
• Superior fit and finish versus BMW 3 Series and Mercedes C-Class
• Piano black trim throughout (attractive but fingerprint-prone)

Seating Comfort and Space

Seating accommodations provide comfort for four adults^[1].

Dimension	Front	Rear
Headroom	37.3 inches	37.4 inches
Legroom	41.3 inches	35.7 inches
Shoulder Room	55.9 inches	54.5 inches

Seat features:

• Heated front seats standard across all trims
• Comfortable sport seats with excellent lateral support
• Ventilated front seats (Prestige standard, Premium Plus optional $1,300)
• Rear seats tight for taller adults over 6 feet
• Five-passenger capacity with firm center rear seat
• Heated rear seats optional on Prestige trim

Interior Color Schemes and Options

Seven interior color combinations available^[1]:

• Black leather (standard, most popular)
• Rock Gray leather (modern sophisticated option)
• Atlas Beige leather (warm, inviting choice)
• Okapi Brown leather (rich, premium appearance)
• Black leather/Alcantara (45 TFSI S line sport combination)
• Emerald Green leather (limited availability, distinctive)
• Ecru/Royal Blue leather (limited availability, bold choice)

Cargo Space and Practicality

Cargo capacity ranks modest within the segment^[1]:

• 12 cubic feet cargo capacity (smaller than class average)
• Smaller than BMW 3 Series (13 cubic feet)
• 60/40 split-folding rear seats expanding capacity
• Pass-through center section for longer items
• Limited storage cubbies and bins throughout cabin
• Small glovebox and center console compartments
• Door pockets accommodate standard water bottles

Noise and Refinement Levels

Cabin quietness impresses during highway driving^[1]:

• Exceptionally quiet cabin rivaling luxury sedans
• Minimal wind noise around mirrors and A-pillars
• Road noise well-controlled with standard tire selection
• Engine remains hushed during normal acceleration
• Dual-clutch transmission operates smoothly without noise
• Superior refinement versus sportier BMW 3 Series

Technology and Infotainment

MMI Infotainment System

The 10.1-inch touchscreen provides comprehensive functionality^[1].

System features:

• 10.1-inch touchscreen standard with MIB 3 interface
• Touchscreen-primary control (fingerprint-prone surface)
• Optional rotary knob controller for some functions
• Crisp graphics with logical menu structure
• Responsive inputs with minimal noticeable lag
• Menu diving required for some common functions
• Learning curve for new owners adapting to system

Connectivity Features

Modern connectivity comes standard^[1]:

• Wireless Apple CarPlay standard (new for 2021, previously wired)
• Wired Android Auto connectivity (not wireless like Apple)
• Two USB ports standard in front
• Rear USB ports (Premium Plus and Prestige trims)
• Bluetooth streaming and hands-free calling
• Voice command functionality with decent recognition
• In-car Wi-Fi with Audi Connect subscription required

Audi Virtual Cockpit Plus

The digital instrument cluster represents cutting-edge technology^[1]:

• 12.3-inch digital cluster (Premium Plus and Prestige standard)
• Customizable layouts with multiple viewing options
• High-resolution graphics and smooth animations
• Navigation map display directly in gauge cluster
• Drive mode integration automatically changing themes
• One of best digital cockpits in entire automotive industry

Audio System Options

Audio quality varies significantly by trim^[1]:

• Standard audio system adequate for most buyers
• Bang & Olufsen 19-speaker premium system optional
• Bang & Olufsen standard on Prestige trim
• Excellent sound quality and precise staging
• SiriusXM satellite radio optional subscription

Driver Assistance Technology

Comprehensive safety technology available across lineup^[1]:

Standard features:

• Automatic emergency braking with pedestrian detection
• Lane-departure warning standard (new for 2021)

Premium Plus/Prestige additions:

• Adaptive cruise control with Traffic Jam Assist
• Lane-keeping assist with steering corrections
• Blind-spot monitoring with rear cross-traffic alert
• 360-degree surround-view camera system
• Front and rear parking sensors
• Automated parking system (Prestige)
• Head-up display (Prestige)

Technology Shortcomings

Despite extensive features, some frustrations emerge^[5]:

• Touchscreen over-reliance versus physical button alternatives
• Menu diving required for climate control adjustments
• System complexity has noticeable learning curve
• Android Auto wired-only (not wireless like Apple CarPlay)
• Virtual Cockpit not standard on base Premium trim ($2,400 option)

Safety Features and Crash Test Ratings

Standard Safety Equipment

Comprehensive passive and active safety systems come standard^[6].

Standard equipment:

• Audi Pre-Sense basic and city collision preparation systems
• Automatic emergency braking with pedestrian detection
• Lane-departure warning standard for 2021
• Electronic stability control with multiple intervention modes
• Anti-lock braking system with brake assist
• Multiple airbags including side curtain protection
• LED headlights with automatic high beams
• ISOFIX child seat mounting points

IIHS and NHTSA Crash Test Results

Safety testing organizations rate the A4 highly^[6].

Test Organization	Overall Rating	Key Results
IIHS	Top Safety Pick	Good ratings all crashworthiness tests
NHTSA	5-star overall	5-star side crash, 5-star rollover
IIHS Headlights	Good/Acceptable	Standard LED rated Good
Front Crash Prevention	Superior	Avoided collisions in testing

Real-World Safety Considerations

Practical safety attributes enhance daily driving confidence^[1]:

• Excellent visibility from driver’s seat with minimal obstructions
• Small blind spots with proper mirror adjustment
• Standard rearview camera with clear resolution
• Surround-view camera aids tight parking situations (Premium Plus/Prestige)
• Comprehensive standard safety equipment across all trims

Trim Levels and Pricing

Premium Trim Features and Pricing

The entry Premium trim includes substantial standard equipment^[1].

40 TFSI Premium: $39,100 (+$995 destination = $40,095 total)
45 TFSI Premium: $40,900 (+$995 destination = $41,895 total)

Standard Premium equipment:

• 2.0L turbo 4-cylinder (201 hp or 261 hp)
• Quattro all-wheel drive standard
• 7-speed dual-clutch automatic
• 17-inch wheels (40 TFSI) or 18-inch (45 TFSI)
• LED headlights and taillights
• Leather upholstery with heated front seats
• Three-zone automatic climate control
• Power sunroof
• 10.1-inch MMI touchscreen
• Wireless Apple CarPlay and wired Android Auto
• Forward collision mitigation
• Lane-departure warning

Premium Plus Trim Upgrades and Pricing

Premium Plus adds $4,700 in technology and convenience features^[1].

40 TFSI Premium Plus: $43,800 (+$995 destination = $44,795 total)

Additional Premium Plus features:

• Audi Virtual Cockpit Plus (12.3-inch digital gauges)
• Adaptive cruise control with Traffic Jam Assist
• Lane-keeping assist with steering corrections
• 360-degree surround-view camera system
• Rear USB charging ports
• Memory front seats with driver settings
• Heated steering wheel
• Keyless entry and push-button start
• Front parking sensors

Prestige Trim Upgrades and Pricing

Top Prestige trim adds luxury and convenience features^[1].

40 TFSI Prestige: $49,900 (+$995 destination = $50,895 total)

Additional Prestige features:

• Bang & Olufsen 19-speaker premium audio (730 watts)
• MMI Navigation Plus with real-time traffic
• Head-up display projecting onto windshield
• Ventilated front seats with 4-way lumbar support
• Heated rear seats
• Ambient LED interior lighting
• Automated parking system with steering automation

Popular Options and Packages

Options can significantly increase final pricing^[1]:

• Convenience Package ($4,700): Included in Premium Plus pricing
• Warm Weather Package ($1,300): Ventilated front seats for Premium Plus
• Navigation Package ($1,500): MMI Navigation Plus for Premium Plus
• Black Optic Package: Black wheels and exterior trim (45 TFSI only)
• S line Interior Package: Aluminum trim, leather/Alcantara (45 TFSI)
• Sport Package: 19-inch wheels with sport suspension
• Cold Weather Package: Heated steering wheel, all-weather mats

Total Cost and Value Analysis

The A4’s pricing positions it competitively^[4]:

• Well-equipped at base price versus German rivals
• Lower than BMW 330i ($41,250 starting in 2021)
• Similar to Mercedes C300 pricing when comparably equipped
• Strong standard equipment justifies premium positioning
• Options push costs significantly with fully loaded models exceeding $55k

Competitive Comparison

2021 Audi A4 vs BMW 3 Series (330i)

The BMW 3 Series represents the A4’s primary competitor^[4].

Comparison Factor	Audi A4 45 TFSI	BMW 330i
Starting Price	$40,900	$41,250
Horsepower	261 hp	255 hp
0-60 mph	4.8 sec	5.3 sec
Fuel Economy	27 mpg combined	30 mpg combined
AWD	Standard quattro	Optional xDrive ($2,000)
Interior Quality	Superior materials	Good but less refined
Driving Dynamics	Comfort-focused	Sport-focused

A4 advantages: More refined ride, superior interior quality, standard AWD, faster acceleration
BMW advantages: More engaging driving dynamics, better fuel economy, sharper handling

2021 Audi A4 vs Mercedes-Benz C300

Mercedes competes with similar luxury positioning^[4]:

• Similar pricing when comparably equipped
• Mercedes 255 hp turbo 4-cylinder versus A4’s 261 hp
• Mercedes 0-60 mph: 5.7 seconds versus A4’s 4.8 seconds (A4 significantly quicker)
• A4 advantages: Better acceleration, superior fuel economy, more advanced Virtual Cockpit
• Mercedes advantages: Prestigious brand image, more luxurious cabin ambiance
• Similar overall quality and refinement levels

2021 Audi A4 vs Genesis G70 2.0T

Genesis offers compelling value proposition^[4]:

• Genesis starting price: $37,525 (lower than A4’s $39,100)
• Genesis 252 hp versus A4’s 261 hp (similar power)
• Genesis 0-60 mph: 5.9 seconds versus A4’s 4.8 seconds
• Genesis 10-year/100,000-mile warranty versus Audi’s 4-year/50,000-mile
• A4 advantages: Better fuel economy, more refined, superior brand prestige
• Genesis advantages: Better value, exceptional warranty, lower price

Where the A4 Ranks in Segment

The A4 occupies a unique position balancing attributes^[1]:

• Strengths: Refinement, interior quality, advanced technology, standard quattro AWD, comfortable ride
• Weaknesses: Less sporty than BMW, limited cargo space (12 cu ft), tight rear seat, higher maintenance costs
• Best for: Buyers prioritizing comfort, tech, and refinement over sportiness
• Not ideal for: Driving enthusiasts wanting BMW dynamics, families needing space

Reliability and Ownership Experience

Warranty Coverage

Audi provides standard German luxury brand warranty terms^[1]:

• Limited warranty: 4 years/50,000 miles
• Powertrain warranty: 4 years/50,000 miles
• Corrosion perforation: 12 years unlimited miles
• Roadside assistance: 4 years
• No complimentary maintenance (Genesis and BMW offer better terms)

Predicted Reliability and Ratings

Reliability predictions show average results^[3]:

• J.D. Power score: 74 out of 100 (average for segment)
• Consumer Reports: Average reliability rating
• Better than older B9 models from early production years
• Manufacturing improvements benefit 2021 model year
• EA888 engine generally reliable with proper maintenance
• DSG transmission solid when serviced correctly

Known Issues and Owner Complaints

Several issues appear in owner reports and forums^[5]:

• Infotainment screen freezing or malfunctioning requiring restarts
• Safety sensor malfunctions (lane departure, blind-spot intermittent)
• Dashboard warning lights illuminating without actual problems
• Lumbar support issues and seat adjustment motor failures
• Smelly A/C on startup (clogged drain pipes common)
• Jerky transmission after cold starts in first 2 gears
• Engine vibrations at idle appearing randomly
• Traffic Jam Assist becoming unavailable without explanation
• Front parking sensors activating randomly without obstacles

Owner Satisfaction Reports

Overall satisfaction remains positive despite issues^[7]:

• 75% recommend the 2021 A4 (Cars.com owner reviews)
• 88% would recommend (Kelley Blue Book surveys)
• 4.5/5 rating overall from KBB reviewers
• Positive feedback: Comfort, technology, performance, refinement, quattro system
• Negative feedback: Value for money concerns, rear seat space limitations
• Excellent LED headlights praised universally by owners

Maintenance Costs and Service

Ownership costs exceed mainstream brands^[3]:

• Higher maintenance than Toyota, Honda, or domestic brands
• Major 40,000-mile service: Includes expensive DSG transmission service ($400-$600)
• Oil changes: $100-$150 at dealerships using synthetic
• Premium parts and labor: Dealership rates higher than independents
• Independent Euro shops: Can reduce costs 30-40%
• Avoid quick-lube shops: Not equipped for Audi-specific requirements

Used 2021 Audi A4 Market

Used Market Availability and Inventory

Good used inventory exists with 2021 models now 4 years old^[8]:

• Good availability nationwide with reasonable selection
• Typical mileage: 30,000-60,000 miles on most examples
• Geographic concentration: Major metro areas have best selection
• Mix of sources: Dealer inventory, CPO programs, private party
• More 45 TFSI models available than base 40 TFSI

Used Pricing and Depreciation Analysis

Current used pricing reveals significant depreciation^[8].

Trim Level	Used Price Range	Original MSRP	Depreciation
Premium	$20,000-$24,000	$39,100-$40,900	~$16,000-$19,000
Premium Plus	$23,000-$27,000	$43,800-$45,600	~$17,000-$21,000
Prestige	$26,000-$30,000	$49,900-$51,700	~$20,000-$24,000

Average depreciation: $13,000-$17,000 (33-40% value loss)
Cost per mile: $0.68-$0.77 over typical 5-year ownership

Used Buying Considerations

Careful inspection protects used buyers^[5]:

• Check maintenance records for 40k DSG service completion
• Verify oil change history (critical for EA888 engine longevity)
• Inspect for infotainment glitches during comprehensive test drive
• Test all driver assistance features confirming proper operation
• Check dashboard for warning lights and fault codes
• Verify remaining warranty (4 years/50,000 miles from original sale)
• Inspect accident history through Carfax or AutoCheck reports
• Test quattro AWD system in various conditions
• Budget for premium fuel ongoing expense consideration
• Plan for 40k service if approaching mileage threshold

Certified Pre-Owned Benefits

Audi’s CPO program provides valuable protections^[8]:

• Extended warranty coverage beyond factory warranty expiration
• 300+ point inspection process claimed by Audi
• Roadside assistance inclusion for peace of mind
• Audi-backed quality assurance with reconditioning standards
• CPO premium pricing: $1,500-$3,000 above private party values
• Limited CPO warranty: 1 additional year unlimited miles
• Powertrain warranty: Extended to 6 years/100,000 miles total

Should You Buy Used or New?

Autvex analysis suggests CPO represents optimal value in 2025.

Used advantages:

• Significant $13,000-$17,000 depreciation savings
• Lower sales tax burden on reduced purchase price
• Known reliability with 2021 model improvements
• Excellent value at $22,000-$28,000 price point

New advantages:

• Full 4-year/50,000-mile warranty coverage
• Latest software updates and features
• No previous owner concerns or history

Recommendation: CPO 2021 A4 offers best overall value proposition balancing price, warranty protection, and peace of mind^[8].

Pros and Cons Summary

Key Strengths of 2021 A4

The A4 excels in several important areas^[1]:

• Refined, comfortable ride quality prioritizing long-distance comfort
• Exceptional interior build quality with premium materials throughout
• Advanced technology with impressive Virtual Cockpit Plus digital gauges
• Strong 45 TFSI performance (4.8-second 0-60 mph beats rivals)
• Standard quattro AWD excellent in all weather conditions
• Quiet cabin with minimal noise intrusion at highway speeds
• IIHS Top Safety Pick and 5-star NHTSA ratings
• Good fuel economy (27-28 mpg combined competitive for class)
• Wireless Apple CarPlay standard (new convenience for 2021)
• 12V mild-hybrid system improves efficiency modestly

Notable Weaknesses and Limitations

Several shortcomings limit universal appeal^[3]:

• Less sporty and engaging than BMW 3 Series dynamics
• Tight rear seat space for taller adults (35.7″ legroom)
• Limited cargo capacity at just 12 cubic feet
• Touchscreen-heavy controls frustrating for some drivers
• Premium fuel required adds $200-$300 ongoing annual expense
• Higher maintenance costs than Japanese luxury brands
• Average reliability (74/100 J.D. Power prediction)
• Known issues with infotainment glitches and sensor malfunctions
• Virtual Cockpit not standard on base Premium trim
• Expensive DSG service required at 40,000 miles ($400-$600)

Deal Breakers vs Justifiable Compromises

Understanding acceptable trade-offs clarifies fit^[4]:

Deal breakers for some buyers:

• Limited rear seat and cargo space inadequate for families
• Less sporty character disappointing for driving enthusiasts
• Higher maintenance costs versus Lexus or Genesis

Justifiable compromises for target buyers:

• Refinement and comfort prioritized over BMW sportiness
• Premium fuel requirement accepted for performance and efficiency
• Higher ownership costs justified by superior build quality

Final Verdict and Buying Recommendations

Who Should Buy the 2021 A4

The A4 makes compelling sense for specific buyer profiles^[1]:

• Refinement-focused buyers prioritizing comfort over BMW sportiness
• Tech enthusiasts wanting advanced Virtual Cockpit technology
• Northern climate drivers requiring confidence-inspiring quattro AWD
• Balanced performance seekers wanting adequate power with efficiency
• Quality-conscious buyers valuing exceptional interior materials
• Comfort commuters prioritizing smooth daily driving experience
• Audi brand loyalists wanting premium German engineering

Who Should Look Elsewhere

Several buyer types find better alternatives^[4]:

• Driving enthusiasts wanting BMW 3 Series engaging dynamics
• Families needing more rear seat space and cargo capacity
• Budget-conscious buyers avoiding premium fuel and high maintenance
• Reliability prioritizers seeking Lexus IS long-term dependability
• Value seekers finding Genesis G70 offers more for less money
• Spacious rear seat requirement for frequent adult passengers

Better Alternatives to Consider

Several competitors warrant consideration^[4]:

• BMW 3 Series: More engaging driving dynamics and sportiness
• Genesis G70: Better value with 10-year/100,000-mile warranty
• Lexus IS: Superior long-term reliability and lower maintenance
• Mercedes C-Class: More luxurious brand image and prestige
• Audi S4: If maximum performance priority (349 hp V6)
• Used 2022-2023 A4: Newer with similar features and technology

Bottom Line Assessment and 2025 Perspective

The 2021 Audi A4 represents a compelling luxury sedan balancing refinement, technology, and performance^[1]. Best-in-class interior quality and advanced Virtual Cockpit technology justify premium positioning. Standard quattro AWD adds significant value versus competitors charging extra for all-wheel drive.

Less sporty than BMW 3 Series but more comfortable for daily driving. In October 2025, the used market offers excellent value at $22,000-$28,000, representing $13,000-$17,000 depreciation from original pricing. CPO models provide optimal balance with extended warranty protection.

Strong choice for comfort-focused luxury sedan buyers prioritizing refinement over ultimate sportiness. Consider comprehensive A4 research before finalizing purchase decisions^[8].

Key Takeaways

1. The 2021 A4 gained 13 hp from new 12V mild-hybrid system, bringing 40 TFSI to 201 hp and 45 TFSI to 261 hp with improved efficiency.
2. Standard quattro AWD became mandatory for 2021, with front-wheel-drive model discontinued, improving all-weather capability across the lineup.
3. The 45 TFSI accelerates 0-60 mph in 4.8 seconds (Car and Driver tested), significantly quicker than Audi’s 5.2-second claim and competitors.
4. Interior quality is exceptional with handsome design and top-tier materials, though rear seat space is tight for taller adults at 35.7 inches legroom.
5. Predicted reliability is average at 74/100 (J.D. Power), with known issues including infotainment glitches and sensor malfunctions requiring attention.
6. Used 2021 models sell for $22,000-$28,000 in 2025, representing $13,000-$17,000 depreciation and excellent value as certified pre-owned purchases.
7. Best suited for buyers prioritizing refinement, tech, and comfort over BMW 3 Series sportiness, with CPO offering optimal value proposition.

FAQs

References

1. Car and Driver. (2020). 2021 Audi A4 Review, Pricing, and Specs. https://www.caranddriver.com/audi/a4-2021
2. Car and Driver. (2020). Tested: 2021 Audi A4 45 Advances a Proven Formula. https://www.caranddriver.com/reviews/a34957337/2021-audi-a4-45-by-the-numbers/
3. J.D. Power. (2025). 2021 Audi A4 Reliability, Consumer Ratings & Pricing. https://www.jdpower.com/cars/2021/audi/a4
4. U.S. News & World Report. (2023). 2021 Audi A4 Review, Pricing, & Pictures. https://cars.usnews.com/cars-trucks/audi/a4/2021
5. Reddit. (2024). How is the reliability on 2021 A4. https://www.reddit.com/r/Audi/comments/1djtbd8/how_is_the_reliability_on_2021_a4/
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