Comparison BMW 8 Series Convertible (G14) 840i (340 Hp) xDrive Steptronic & Buick Regal I Sedan 5.7 V8 (142 Hp) Automatic
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| Brand: | BMW | Buick |
| Model: | 8 Series | Regal |
| Generation: | 8 Series Convertible (G14) | Regal I Sedan |
| Engine / modification: | 840i (340 Hp) xDrive Steptronic | 5.7 V8 (142 Hp) Automatic |
| Production start: | 2019 year | 1973 year |
| Production end: | 2020 year | 1977 year |
| Coupe type: | Cabriolet | Sedan |
| Num. of Doors: | 2 | 4 |
| Num. of seats: | 4 | 5 |
| Fuel consumption / economy - urban: | 9.7-9.8 l/100 km | |
| Fuel consumption / economy - extra urban: | 6.6-6.7 l/100 km | |
| Fuel consumption / economy - combined: | 7.7-7.8 l/100 km | |
| Fuel Type: | Petrol (Gasoline) | Petrol (Gasoline) |
| Drag coefficient: | 0.31 | 0.50 |
| Fuel tank volume: | 68 l | 83 l |
| Emission standard: | Euro 6d - TEMP | |
| CO2 emissions: | 175-178 g/km | |
| Power: | 340 hp | 142 hp |
| Max power in: | 5000-6500 rpm. | 3200 rpm. |
| Maximum speed: | 250 km/h | |
| Acceleration from 0 to 100 km/h: | 4.9 sec | |
| Torque: | 500 Nm @ 1600-4500 rpm. | 380 Nm @ 1600 rpm. |
| Model Engine: | B58B30 | |
| Engine position: | Front, longitudinal | Front, longitudinal |
| Engine displacement: | 2998 cm3 | 5724 cm3 |
| Engine oil capacity: | 6.5 l | |
| Fuel System: | Direct injection | Carburettor |
| Aspiration / Turbine: | Twin-power turbo | |
| Position of cylinders: | Inline | V engine |
| Number of cylinders: | 6 | 8 |
| Number of valves per cylinder: | 4 | 2 |
| Compression ratio: | 11 | 8 |
| Piston Stroke: | 94.6 mm | 97.79 mm |
| Cylinder Bore: | 82 mm | 96.52 mm |
| Wheel Drive: | All wheel drive (4x4) | Rear wheel drive |
| Number of Gears (automatic transmission): | 8 Steptronic | 3 Hydramatic |
| Length: | 4843 mm | 5486 mm |
| Width: | 1902 mm | 2007 mm |
| Width including mirrors: | 2137 mm | |
| Height: | 1339 mm | 1374 mm |
| Wheelbase: | 2822 mm | 2946 mm |
| Front track: | 1627 mm | 1562 mm |
| Rear (Back) track: | 1642 mm | 1542 mm |
| Ride height(clearance): | 118 mm | |
| Front overhang: | 953 mm | |
| Rear overhang: | 1076 mm | |
| Minimum volume of Luggage (trunk): | 280 l | 442 l |
| Maximum amount of Luggage (trunk): | 350 l | |
| Front suspension: | Double wishbone | |
| Rear suspension: | Multi-link independent | |
| Max weight: | 2400 kg | |
| Front brakes: | Ventilated discs | Ventilated discs |
| Rear brakes: | Ventilated discs | Drum |
| Kerb Weight: | 1880 kg | 1862 kg |
| ABS: | yes | |
| Steering type: | Steering rack and pinion | |
| Power steering: | Electric Steering | |
| Permitted trailer load with brakes (8%): | 1305 kg | |
| Minimum turning circle (turning diameter): | 11.9 m | 13.8 m |
| Permitted trailer load with brakes (12%): | 1305 kg | |
| Tire size: | 245/45 R18 100Y XL; 275/40 R18 103Y XL | 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 |