Comparison BMW M8 Coupe Competition 4.4 V8 (625 Hp) xDrive Steptronic & Buick Riviera 3.8 i V6 Supercharged (228 Hp)
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| Brand: | BMW | Buick |
| Model: | M8 | Riviera |
| Generation: | M8 Coupe | Riviera |
| Engine / modification: | Competition 4.4 V8 (625 Hp) xDrive Steptronic | 3.8 i V6 Supercharged (228 Hp) |
| Production start: | 2019 year | 1994 year |
| Production end: | 1997 year | |
| Coupe type: | Coupe | Coupe |
| Num. of Doors: | 2 | 2 |
| Num. of seats: | 4 | 5 |
| Fuel consumption / economy - urban: | 15.2-15.3 l/100 km | 18 l/100 km |
| Fuel consumption / economy - extra urban: | 7.7-8.0 l/100 km | 10 l/100 km |
| Fuel consumption / economy - combined: | 10.5-10.6 l/100 km | |
| Fuel Type: | Petrol (Gasoline) | Petrol (Gasoline) |
| Fuel tank volume: | 68 l | 73 l |
| Emission standard: | Euro 6d-Temp | |
| CO2 emissions: | 238-242 g/km | |
| Power: | 625 hp | 228 hp |
| Max power in: | 6000 rpm. | 5000 rpm. |
| Maximum speed: | 250 km/h | 220 km/h |
| Acceleration from 0 to 100 km/h: | 3.2 sec | |
| Torque: | 750 Nm @ 1800-5800 rpm. | 373 Nm/3200 rpm. |
| Engine position: | Front, longitudinal | Front, transverse |
| Engine displacement: | 4395 cm3 | 3791 cm3 |
| Fuel System: | Direct injection | Multi-point injection |
| Aspiration / Turbine: | Twin-power turbo | Mechanical supercharging (Compressor) |
| Position of cylinders: | V engine | V engine |
| Valvetrain: | - | |
| Number of cylinders: | 8 | 6 |
| Number of valves per cylinder: | 4 | 2 |
| Compression ratio: | 10 | 9.4 |
| Piston Stroke: | 88.3 mm | 86.4 mm |
| Cylinder Bore: | 89 mm | 96.5 mm |
| Wheel Drive: | All wheel drive (4x4) | Front wheel drive |
| Number of Gears (automatic transmission): | 8 M Steptronic | 4 |
| Length: | 4867 mm | 5263 mm |
| Width: | 1907 mm | 1906 mm |
| Height: | 1362 mm | 1386 mm |
| Wheelbase: | 2827 mm | 2890 mm |
| Front track: | 1627 mm | 1588 mm |
| Rear (Back) track: | 1632 mm | 1589 mm |
| Minimum volume of Luggage (trunk): | 493 l | |
| Maximum amount of Luggage (trunk): | 420 l | |
| Front suspension: | Double wishbone | The depreciated rack |
| Rear suspension: | Multi-link independent | Double wishbone |
| Max weight: | 2385 kg | |
| Front brakes: | Ventilated discs | Ventilated discs |
| Rear brakes: | Ventilated discs | Disc |
| Kerb Weight: | 1885 kg | 1696 kg |
| ABS: | yes | yes |
| Steering type: | Steering rack and pinion | Steering rack and pinion |
| Power steering: | Electric Steering | Hydraulic Steering |
| Minimum turning circle (turning diameter): | 12.2 m | |
| Tire size: | 275/35 ZR20 102Y XL; 285/35 ZR20 104Y XL | 225/60 R16 S |
| Wheel rims size: | 9.5J x 20; 10.5J x 20 |