The 2023 BMW M8 Gran Coupe is the big, brash, and beautiful four-door member of the M8 family. We separately review this model’s coupe and convertible siblings. While the M8 Gran Coupe provides a much bigger back seat and expanded cargo space than those two, it shares their, ballistic 617-hp twin-turbo V-8, which delivers explosive acceleration. The engine is aided by an excellent eight-speed automatic and an all-wheel-drive system that features a rear-drive mode for smokey burnouts or sideways shenanigans. Despite its significant mass, the 2023 M8 Gran Coupe has cornering grip and stopping power to embarrass lighter sports cars. However, its insane performance is diminished by distant steering feel and a ride that can be punishing at times. Nobody will be disappointed by its richly appointed interior, though the aforementioned flaws and the Bimmer’s surplus of drive-mode settings make us prefer the Audi RS7.
What’s New for 2023?
BMW makes a handful of changes to the M8 Gran Coupe for the 2023 model year. Along with dark accents inside the adaptive LED headlights, there’s a wider selection of metallic paint colors that includes Skyscraper Grey, Brooklyn Grey, Isle of Man Green, Tanzanite Blue II, and Frozen Pure Grey. There’s also an option to replace BMW’s classic roundel with the M logo on the hood, trunk, and wheel hubs. Inside, the M8 Gran Coupe can now be fitted with the lightweight M Carbon competition seats that debuted on the latest-generation M3 sedan and M4 coupe. There’s a new color option for the Merino leather and microsuede upholstery, and the touchscreen grows from 10.3 to 12.3 inches.
Pricing and Which One to Buy
The M8 Gran Coupe only comes one way, so we’d recommend several options to maximize its luxury and performance. We’d select the Comfort Seating package that brings remote start, multiple heated surfaces, and retractable shades for the back seat. Individually, the carbon-ceramic brakes add cred to the M in front of the Gran Coupe’s 8 and better withstand the abuse of a track day. Speaking of racetrack action, we’d recommend the M Driver’s pack, which includes a day of professional training to learn how to safely exploit the M8’s talents and maybe briefly forget how much it costs. Choosing the latter option also raises its electrically limited top speed from 155 to 190 mph.
Engine, Transmission, and Performance
The M8 Gran Coupe is powered by a lusty twin-turbo 4.4-liter V-8 that makes 617 horsepower, thanks to the adoption of the previously optional Competition package. The exceptionally smooth engine sends that power to all four wheels via a responsive eight-speed automatic transmission. However, tail-out antics are made possible by a selectable rear-wheel-drive mode that routes all the V-8’s fury to the back. This rocket-powered four-door shot to 60 mph in just 2.7 seconds and completed the quarter-mile in 10.8 ticks at 129 mph. These numbers are impressive for some supercars, let alone a sedan that weighs more than 4300 pounds. While it’s furiously quick and provides more than 1.0 g of cornering grip, the big M8 suffers from indifferent steering feel and a stiff ride that compromises its comfort. A specially tuned adaptive suspension comes standard, and it can be adjusted through the sedan’s customizable or preset drive modes, but even the softest damper setting isn’t soft at all. Its strong brakes will haul it down from 70 mph in an impressively short 147 feet, but the Bimmer’s brake-by-wire system returned uneven responses through the pedal, regardless of the two available brake settings (Comfort and Sport).
Fuel Economy and Real-World MPG
With estimates of 15 mpg in the city and 21 mpg on the highway, the V-8-powered M8 Gran Coupe certainly won’t be confused for a hybrid. However, those figures are on par with other fast four-doors in this fast-sedan class, such as the RS7 (15 mpg city, 22 highway). We haven’t tested the M8 GC on our 75-mph highway fuel-economy route, which is part of our extensive testing regimen, but when we get the chance we can evaluate its real-world mpg. For more information about the M8 Gran Coupe’s fuel economy, visit the EPA’s website.
Interior, Comfort, and Cargo
The M8 Gran Coupe features an exquisitely appointed interior that looks as rich as it feels. While the design is more dignified than dazzling, the four-door M8 provides plentiful rear passenger space. It also offers a cornucopia of desirable standard features such as a 12.3-inch digital gauge cluster, 16-way power front seats with memory settings, heating, and ventilation, four-zone climate control, leather upholstery, and more. Buyers can also enhance the cabin with novel color schemes and fancy trims as well as a Comfort Seating package. This adds heated seats throughout along with power sunshades for rear-seat passengers. Likewise, the lightweight M Carbon front seats are optional, but their stiff lower side bolsters make ingress and egress a pain, and they might be generally too aggressive for most drivers. While the back seat features three seatbelts–unlike the rear buckets in the GT63 S–the middle seat is best left unoccupied except for all but the shortest trips. The Gran Coupe’s trunk provides 11 cubic feet of storage space, but that’s 15 cubes less (25 total) than the volume under the RS7’s rear hatch.
Infotainment and Connectivity
Every M8 Gran Coupe is equipped with a 12.3-inch touchscreen infotainment system that can also be operated with a rotary controller on the center console. Along with its 16-speaker Harman/Kardon sound system, the brawny BMW has a Wi-Fi hotspot and Apple CarPlay and Android Auto as standard. Those who aren’t satisfied with the default audio unit can upgrade to a more powerful Bowers & Wilkins setup.
Safety and Driver-Assistance Features
While copious driver-assistance technology is available, everything except forward-collision warning and automated emergency braking costs extra. For more information about the M8 Gran Coupe’s crash-test results, visit the National Highway Traffic Safety Administration (NHTSA) and Insurance Institute for Highway Safety (IIHS) websites. Key safety features include:
- Available adaptive cruise control with stop-and-go technology
- Available blind-spot monitoring and rear cross-traffic alert
- Available lane-departure warning and lane-keeping assist
Warranty and Maintenance Coverage
BMW provides a competitive limited and powertrain warranty compared with luxury rivals’ plans. It also makes Mercedes-AMG look bad by providing complimentary scheduled maintenance.
- Limited warranty covers four years or 50,000 miles
- Powertrain warranty covers four years or 50,000 miles
- Complimentary maintenance is covered for three years or 36,000 miles
2020 BMW M8 Competition Gran Coupe
front-engine, rear-/all-wheel-drive, 5-passenger, 4-door sedan
PRICE AS TESTED
$167,245 (base price: $144,995)
twin-turbocharged and intercooled DOHC 32-valve V-8, aluminum block and heads, direct fuel injection
268 in3, 4395 cm3
617 hp @ 6000 rpm
553 lb-ft @ 1800 rpm
Suspension (F/R): multilink/multilink
Brakes (F/R): 15.7-in vented, cross-drilled ceramic disc/15.0-in vented, cross-drilled ceramic disc
Tires: Michelin Pilot Sport 4S, F: 275/35ZR-20 (102Y) ★ R: 285/35ZR-20 (104Y) ★
Wheelbase: 119.2 in
Length: 200.9 in
Width: 76.5 in
Height: 55.9 in
Passenger volume: 97 ft3
Cargo volume: 11 ft3
Curb weight: 4377 lb
C/D TEST RESULTS
60 mph: 2.7 sec
100 mph: 6.5 sec
1/4 mile: 10.8 sec @ 129 mph
150 mph: 15.9 sec
Results above omit 1-ft rollout of 0.2 sec.
Rolling start, 5–60 mph: 3.7 sec
Top gear, 30–50 mph: 2.4 sec
Top gear, 50–70 mph: 2.5 sec
Top speed (mfr’s claim): 190 mph
Braking, 70–0 mph: 147 ft
Braking, 100–0 mph: 291 ft
Roadholding, 300-ft-dia skidpad: 1.02 g
C/D FUEL ECONOMY
Observed: 16 mpg
EPA FUEL ECONOMY
Combined/city/highway: 17/15/21 mpg
C/D TESTING EXPLAINED
More Features and Specs