2023 BMW M8 Gran Coupe Review: 617-HP GT

The 2023 BMW M8 Gran Coupe delivers 617 horsepower from its twin-turbo V8, accelerates to 60 mph in just 2.7 seconds, and offers four-door practicality in a stunning fastback design[1]. Originally priced at $135,095, used examples now trade between $72,252 and $85,000, representing exceptional value for supercar-level performance[2]. The Drive called it an explosive, ridiculous hooligan that gets the modern sport sedan formula just right, awarding it 9 out of 10[1].

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Overview: Why the M8 Gran Coupe Matters

The BMW M8 Gran Coupe occupies a unique position in the high-performance four-door segment. Unlike conventional sedans, its dramatically swept roofline creates a coupe-like silhouette while maintaining genuine four-door practicality[3]. The car debuted in 2020 and received no significant changes for 2023, continuing with the Competition package as standard equipment.

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For 2023, the M8 Gran Coupe started at $134,000 ($135,095 as tested by The Drive)[1][4]. Today, used examples have depreciated significantly, making this flagship more accessible than ever. Edmunds reports trade-in values ranging from $72,252 to $82,048, while dealer listings show asking prices between $83,500 and $115,000 depending on mileage and condition[2][5].

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For buyers exploring the BMW lineup, the M8 Gran Coupe represents the pinnacle of non-hybrid performance sedans.

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Specifications Overview

Category2023 BMW M8 Competition Gran Coupe
Original MSRP$134,000 (as tested: $150,845)[1]
Engine4.4L Twin-Turbo V8[1]
Horsepower617 hp @ 6,000 rpm[1]
Torque553 lb-ft @ 1,800 rpm[1]
0-60 mph2.7 seconds (tested)[6]
Quarter-Mile10.8 sec @ 129 mph[6]
EPA Fuel Economy15 city / 22 highway / 17 combined mpg[1]
Cargo Space~15 cu ft[7]
Curb Weight4,480 lbs[1]
DrivetrainxDrive AWD (RWD mode available)[3]
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Design and Practicality

Exterior

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The M8 Gran Coupe presents one of BMW's most cohesive designs, with a sweeping fastback roofline that creates visual drama without the controversial styling of newer BMW models[3]. Quad exhaust tips, aggressive front air intakes, and available carbon fiber exterior elements distinguish it from the standard 8 Series Gran Coupe[3].

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Vicarious Mag praised the design, noting the M8 Gran Coupe delivers an unforgettable visual presence on the road[8]. At just over 200 inches long, the car commands attention while maintaining elegant proportions.

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Interior

Inside, the M8 Gran Coupe delivers richly appointed luxury that Car and Driver says nobody will be disappointed by[3]. The cabin uses premium materials throughout, with Merino leather, real metal accents, and carbon fiber trim depending on options selected.

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Standard equipment includes:

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  • 12.1-inch digital instrument cluster
  • 12.3-inch central touchscreen with iDrive
  • Merino leather upholstery
  • 16-speaker Harman Kardon surround sound
  • Heated front seats
  • Wireless Apple CarPlay and Android Auto[7]
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The main compromise is rear headroom. Car and Driver notes the squashed roofline limits space for taller passengers[3]. The trunk offers approximately 15 cubic feet, competitive for this class and notably more practical than the two-door M8 Coupe[7].

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Performance and Efficiency

Powertrain

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The 2023 M8 Gran Coupe's twin-turbocharged 4.4-liter V8 produces 617 horsepower and 553 lb-ft of torque[1]. An eight-speed automatic transmission routes power to all four wheels through BMW's xDrive system, with a crucial RWD mode for enthusiasts seeking tail-out driving[3].

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Car and Driver recorded a 2.7-second 0-60 mph time and a 10.8-second quarter-mile at 129 mph[6]. Despite tipping the scales at 4,480 pounds, the M8 Gran Coupe generates 1.02 g of cornering grip and delivers 147-foot stops from 70 mph, leading its competitive set in braking performance[6].

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Driving Experience

The Drive awarded the 2023 M8 Gran Coupe 9 out of 10, calling it an explosive, ridiculous hooligan[1]. Vicarious Mag praised the rear-biased xDrive system and electronic aids, noting that any middling pilot can feel like an ace behind the wheel[8]. The rear end wriggles and writhes on corner exit for an unforgettable sensation, never letting things cross the line[8].

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However, Car and Driver identifies compromises: distant steering feel, a surplus of drive-mode settings, and a ride that can be punishing at times[3]. These flaws led Car and Driver to prefer the Audi RS7 in direct comparison, though the M8's raw performance remains undeniably impressive[3].

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Understanding what fuel BMWs require is essential. The M8 demands premium unleaded, adding to running costs.

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Fuel Economy

EPA estimates sit at 15 mpg city, 22 mpg highway, and 17 mpg combined[1]. Edmunds recorded an exceptional 21.8 mpg on their 115-mile mixed driving loop, demonstrating the M8 can outperform its estimates with restrained driving[9]. Car and Driver observed 16 mpg during their testing[6].

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With the 20.1-gallon fuel tank, expect approximately 340-440 miles between fill-ups depending on driving style.

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Features and Technology

The 2023 M8 Gran Coupe Competition came well-equipped. Standard features included:

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  • xDrive all-wheel drive with RWD mode
  • Adaptive M suspension
  • Active steering
  • M Sport exhaust system
  • Navigation with real-time traffic
  • Collision warning with emergency braking[7]
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Popular available upgrades included:

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  • Bowers & Wilkins Diamond Surround Sound System: ~$3,400[7]
  • M Carbon Fiber Exterior Package: ~$5,400[7]
  • M Driver's Package (190 mph top speed): ~$2,500[7]
  • Executive Package (soft-close doors, parking assistance)[7]
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A well-optioned 2023 M8 Gran Coupe could exceed $150,000 when new[1].

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Pricing: New vs Used Value

ConditionPrice Range
Original MSRP (2023)$134,000-$150,000+[1][4]
Trade-In Value (2025)$72,252-$82,048[2]
Private Party Value$74,090-$78,899[2]
Dealer Retail (2025)$83,500-$115,000[5]
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Values as of December 2025. Prices vary based on mileage, condition, and options.

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The 2023 M8 Gran Coupe has experienced significant depreciation. Edmunds projects total 5-year depreciation of approximately $36,377 from original MSRP, reaching approximately $46,240 by 2028[2]. This makes lightly used examples exceptional value for buyers seeking supercar performance at a substantial discount.

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For context on BMW maintenance costs, expect premium pricing, especially after the 4-year/50,000-mile warranty expires.

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Reliability and Common Issues

The M8 Gran Coupe uses BMW's established S63 V8 engine, which has proven generally reliable when properly maintained[10]. Common reported issues include:

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  • Brake Squeal: Owners report squeaking brakes even at low mileage, particularly with ceramic options[10]
  • Transmission Wiring Harness: Some vehicles experienced wiring harness shorts causing sudden stops; BMW issued recalls to replace and reroute the harness[10]
  • Oil Consumption: The M8 burns oil faster than standard vehicles, requiring regular level checks[10]
  • Defective Hydraulic Unit: Vehicles produced between December 2018 and February 2021 were recalled for faulty brake hydraulic units[10]
  • Spark Plugs and Ignition Coils: Failures can cause misfires, hard starts, and rough idling; regular replacement is recommended[10]
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Owner forums report that vehicles maintained according to BMW's schedule generally deliver trouble-free ownership[11]. Reliability has reportedly improved since the 2020 launch year[11].

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Competitor Comparison

Vehicle2023 MSRPPower0-60 mphTest Result
BMW M8 Gran Coupe$134,000[4]617 hp[1]2.7 sec[6]3rd place[6]
Mercedes-AMG GT 63 S~$150,000[4]630 hp[6]2.6 sec[6]1st place[6]
Audi RS7~$128,600[6]591 hp[6]2.9 sec[6]2nd place[6]
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Car and Driver's comparison test placed the Mercedes-AMG GT 63 S first, praising its superior acceleration (2.6 sec 0-60) and cornering grip (1.05 g vs 1.02 g)[6]. The Audi RS7 earned second place for its refined demeanor and more comfortable ride[6]. The M8 finished third despite leading in braking performance (147 ft from 70 mph vs 157 ft for the Mercedes) and fuel economy (tied at 16 mpg observed)[6].

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However, Car and Driver called the M8 the dragster of the group, noting it's the only one willing to do a Big Daddy Don Garlits-style burnout in RWD mode[6]. For buyers comparing within BMW, the M8 Coupe offers the same powertrain in a two-door package, while the M5 provides a more traditional sedan shape.

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Pros and Cons

Pros:

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  • Supercar-level acceleration (2.7 sec 0-60) with four-door practicality[1]
  • Best-in-class braking performance (147 ft from 70 mph)[6]
  • Available RWD mode for enthusiast driving and burnouts[6]
  • Exceptional used car value ($72,000-$85,000 vs $134,000+ new)[2]
  • Real-world fuel economy can exceed EPA estimates (21.8 mpg observed)[9]
  • The Drive's 9/10 rating as an explosive, ridiculous hooligan[1]
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Cons:

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  • Distant steering feel diminishes driver connection[3]
  • Ride can be punishing at times[3]
  • Squashed roofline compromises rear headroom[3]
  • Surplus of drive-mode settings adds complexity[3]
  • Higher oil consumption than standard vehicles[10]
  • Finished last in Car and Driver's three-way comparison[6]
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Key Takeaways

  • The 2023 BMW M8 Gran Coupe delivers 617 hp and reaches 60 mph in 2.7 seconds, with The Drive awarding it 9 out of 10 as an explosive, ridiculous hooligan
  • Used examples trade between $72,252 and $85,000, representing exceptional value compared to the $134,000+ original MSRP
  • Best-in-class braking performance (147 ft from 70 mph) and available RWD mode for burnouts distinguish it from rivals
  • Car and Driver placed it third behind the Mercedes-AMG GT 63 S and Audi RS7 due to distant steering and punishing ride quality
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FAQs

How fast is the 2023 BMW M8 Gran Coupe?

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How much is a used 2023 BMW M8 Gran Coupe worth?

Is the 2023 BMW M8 Gran Coupe reliable?

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How does the M8 Gran Coupe compare to the Mercedes-AMG GT 63 S?

References

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  1. The Drive. (2023). 2023 BMW M8 Competition Gran Coupe Review. https://www.thedrive.com/car-reviews/2023-bmw-m8-competition-gran-coupe-review-specs-price-options-impressions
  2. Edmunds. (2025). 2023 BMW M8 Gran Coupe Value. https://www.edmunds.com/bmw/m8-gran-coupe/2023/appraisal-value/
  3. Car and Driver. (2023). 2023 BMW M8 Gran Coupe Review, Pricing, and Specs. https://www.caranddriver.com/bmw/m8-gran-coupe-2023
  4. CarBuzz. (2023). 2023 BMW M8 Gran Coupe Review, Pricing, Photos, and Specs. https://carbuzz.com/cars/bmw/m8-gran-coupe/2023/
  5. Autotrader. (2025). Used 2023 BMW M8 Gran Coupe xDrive for Sale. https://www.autotrader.com/cars-for-sale/2023/bmw/m8-gran-coupe-xdrive
  6. Car and Driver. (2021). Tested: 2021 Audi RS7 vs. BMW M8 GC vs. Mercedes-AMG GT63 S. https://www.caranddriver.com/reviews/comparison-test/a36062926/2021-audi-rs7-vs-2020-bmw-m8-gran-coupe-2021-mercedes-amg-gt63-s/
  7. Cars.com. (2023). 2023 BMW M8 Gran Coupe Specs, Dimensions & Colors. https://www.cars.com/research/bmw-m8_gran_coupe-2023/specs/
  8. Vicarious Mag. (2023). Road Test: 2023 BMW M8 Competition Gran Coupe. https://www.vicariousmag.com/road-test-2023-bmw-m8-competition-gran-coupe/
  9. Edmunds. (2023). 2023 BMW M8 Gran Coupe Review & Ratings. https://www.edmunds.com/bmw/m8-gran-coupe/2023/
  10. Exotic Car Hacks. (2024). BMW M8 Buyers Guide. https://www.exoticcarhacks.com/buyers-guides/bmw-m8-buyers-guide/
  11. BimmerPost. (2023). M8 Reliability Discussion. https://f92.bimmerpost.com/forums/showthread.php?t=1994143
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