Comparison BMW 8 Series Gran Coupe (G16) 840d (320 Hp) xDrive Steptronic & Buick Regal II Coupe (facelift 1981) 3.8 V6 (172 Hp) Automatic & Buick Regal I Sedan 5.7 V8 (152 Hp) Automatic
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| Brand: | BMW | Buick | Buick |
| Model: | 8 Series | Regal | Regal |
| Generation: | 8 Series Gran Coupe (G16) | Regal II Coupe (facelift 1981) | Regal I Sedan |
| Engine / modification: | 840d (320 Hp) xDrive Steptronic | 3.8 V6 (172 Hp) Automatic | 5.7 V8 (152 Hp) Automatic |
| Production start: | 2019 year | 1981 year | 1973 year |
| Production end: | 2020 year | 1987 year | 1977 year |
| Coupe type: | Coupe | Coupe | Sedan |
| Num. of Doors: | 4 | 2 | 4 |
| Num. of seats: | 5 | 5 | 5 |
| Fuel consumption / economy - urban: | 7.3-7.4 l/100 km | 12.4 l/100 km | |
| Fuel consumption / economy - extra urban: | 5.1-5.7 l/100 km | 8.7 l/100 km | |
| Fuel consumption / economy - combined: | 5.9-6.3 l/100 km | 10.7 l/100 km | |
| Fuel Type: | Diesel | Petrol (Gasoline) | Petrol (Gasoline) |
| Drag coefficient: | 0.29 | 0.45 | 0.50 |
| Fuel tank volume: | 68 l | 68 l | 83 l |
| Emission standard: | Euro 6d-Temp | ||
| CO2 emissions: | 155-166 g/km | ||
| Power: | 320 hp | 172 hp | 152 hp |
| Max power in: | 4400 rpm. | 4000 rpm. | 3600 rpm. |
| Maximum speed: | 250 km/h | ||
| Acceleration from 0 to 100 km/h: | 5.1 sec | ||
| Torque: | 680 Nm @ 1750-2250 rpm. | 373 Nm @ 2400 rpm. | 366 Nm @ 2000 rpm. |
| Model Engine: | B57D30 | LD5/LC6 | |
| Engine position: | Front, longitudinal | Front, longitudinal | Front, longitudinal |
| Engine displacement: | 2993 cm3 | 3791 cm3 | 5724 cm3 |
| Engine oil capacity: | 6.5 l | 4.7 l | |
| Coolant: | 9.5 l | 12.5 l | |
| Fuel System: | Diesel Commonrail | Carburettor | Carburettor |
| Aspiration / Turbine: | Twin-power turbo | Turbocharger | |
| Position of cylinders: | Inline | V engine | V engine |
| Valvetrain: | OHV | ||
| Number of cylinders: | 6 | 6 | 8 |
| Number of valves per cylinder: | 4 | 2 | 2 |
| Compression ratio: | 16.5 | 8 | 8.5 |
| Piston Stroke: | 90 mm | 86.36 mm | 97.79 mm |
| Cylinder Bore: | 84 mm | 96.52 mm | 96.52 mm |
| Wheel Drive: | All wheel drive (4x4) | Rear wheel drive | Rear wheel drive |
| Number of Gears (automatic transmission): | 8 Steptronic | 3 Hydramatic | 3 Hydramatic |
| Length: | 5082 mm | 5095 mm | 5486 mm |
| Width: | 1932 mm | 1819 mm | 2007 mm |
| Width including mirrors: | 2137 mm | ||
| Height: | 1407 mm | 1374 mm | 1374 mm |
| Wheelbase: | 3023 mm | 2746 mm | 2946 mm |
| Front track: | 1627 mm | 1486 mm | 1562 mm |
| Rear (Back) track: | 1671 mm | 1468 mm | 1542 mm |
| Ride height(clearance): | 145 mm | ||
| Front overhang: | 953 mm | ||
| Rear overhang: | 1106 mm | ||
| Minimum volume of Luggage (trunk): | 459 l | 428 l | |
| Maximum amount of Luggage (trunk): | 440 l | ||
| Front suspension: | Double wishbone | Independent, spring | |
| Rear suspension: | Multi-link independent | Suspension De-Dion | |
| Max weight: | 2560 kg | ||
| Front brakes: | Ventilated discs | Ventilated discs | Ventilated discs |
| Rear brakes: | Ventilated discs | Drum | Drum |
| Kerb Weight: | 1925 kg | 1523 kg | 1880 kg |
| ABS: | yes | ||
| Steering type: | Steering rack and pinion | Cone worm with recirculation balls | |
| Power steering: | Electric Steering | ||
| Max. roof load: | 75 kg | ||
| Minimum turning circle (turning diameter): | 12.8 m | 13.8 m | |
| Tire size: | 245/45 R18 100Y XL; 275/40 R18 103Y XL | 205/70 R14 | 185/75 R14; 195/70 R14; 205/65 R14; 215/60 R14; 195/70 R14 |
| Wheel rims size: | 8J x 18; 9J x 18 | R14 | R14 |