Comparison BMW M8 Coupe Prototype (E31) 6.0 V12 (640 Hp) & Buick Regal II Coupe (facelift 1981) 3.8 V6 (112 Hp) Automatic
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| Brand: | BMW | Buick |
| Model: | M8 | Regal |
| Generation: | M8 Coupe Prototype (E31) | Regal II Coupe (facelift 1981) |
| Engine / modification: | 6.0 V12 (640 Hp) | 3.8 V6 (112 Hp) Automatic |
| Production start: | 1992 year | 1981 year |
| Production end: | 1992 year | 1987 year |
| Coupe type: | Coupe | Coupe |
| Num. of Doors: | 2 | 2 |
| Num. of seats: | 4 | 5 |
| Fuel consumption / economy - urban: | 11.2 l/100 km | |
| Fuel consumption / economy - extra urban: | 7.8 l/100 km | |
| Fuel consumption / economy - combined: | 10.6 l/100 km | 9.8 l/100 km |
| Fuel Type: | Petrol (Gasoline) | Petrol (Gasoline) |
| Drag coefficient: | 0.45 | |
| Fuel tank volume: | 68 l | |
| Emission standard: | EURO VI | |
| CO2 emissions: | 242 g/km | 101 g/km |
| Power: | 640 hp | 112 hp |
| Max power in: | 7500 rpm. | 3800 rpm. |
| Maximum speed: | 160 km/h | |
| Acceleration from 0 to 100 km/h: | 14.9 sec | |
| Torque: | 650 Nm @ 5600 rpm. | 258 Nm @ 1600 rpm. |
| Model Engine: | S70/2 | LD5/LC6 |
| Engine position: | Front, longitudinal | Front, longitudinal |
| Engine displacement: | 6064 cm3 | 3791 cm3 |
| Engine oil capacity: | 4.7 l | |
| Coolant: | 12.5 l | |
| Fuel System: | Carburettor | |
| Position of cylinders: | V engine | |
| Valvetrain: | DOHC | OHV |
| Number of cylinders: | 12 | 6 |
| Number of valves per cylinder: | 4 | 2 |
| Compression ratio: | 11 | 8 |
| Piston Stroke: | 87 mm | 86.36 mm |
| Cylinder Bore: | 86 mm | 96.52 mm |
| Wheel Drive: | Rear wheel drive | Front wheel drive |
| Number of Gears (automatic transmission): | 3 Hydramatic | |
| Number of Gears (manual transmission): | 6 | 5 |
| Length: | 4780 mm | 5095 mm |
| Width: | 1855 mm | 1819 mm |
| Width with mirrors folded: | 1783 mm | |
| Width including mirrors: | 1941 mm | |
| Height: | 1330 mm | 1374 mm |
| Wheelbase: | 2684 mm | 2746 mm |
| Front track: | 1554 mm | 1486 mm |
| Rear (Back) track: | 1562 mm | 1468 mm |
| Minimum volume of Luggage (trunk): | 459 l | |
| Maximum amount of Luggage (trunk): | 1093 l | |
| Front suspension: | Independent, spring | |
| Rear suspension: | Suspension De-Dion | |
| Max weight: | 1605 kg | |
| Front brakes: | Ventilated discs | |
| Rear brakes: | Drum | |
| Kerb Weight: | 1443 kg | 1490 kg |
| ABS: | yes | |
| Steering type: | Cone worm with recirculation balls | |
| Power steering: | Hydraulic Steering | Electric Steering |
| Max. roof load: | 50 kg | |
| Minimum turning circle (turning diameter): | 12.8 m | |
| Tire size: | Front wheel tires: 235/45 R17 | 195/75 R14 |
| Wheel rims size: | Front wheel rims: 8J x 17 | R14 |