Comparison Buick Regal II Coupe 5.0 V8 (137 Hp) Automatic & Opel Astra G Cabrio 1.6 16V (103 Hp) & BMW 7 Series (E66) 730Li (231 Hp) Steptronic
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| Brand: | Buick | Opel | BMW |
| Model: | Regal | Astra | 7 Series |
| Generation: | Regal II Coupe | Astra G Cabrio | 7 Series (E66) |
| Engine / modification: | 5.0 V8 (137 Hp) Automatic | 1.6 16V (103 Hp) | 730Li (231 Hp) Steptronic |
| Production start: | 1978 year | 2000 year | 2004 year |
| Production end: | 1987 year | 2004 year | 2005 year |
| Coupe type: | Coupe | Cabriolet | Sedan |
| Num. of Doors: | 2 | 2 | 4 |
| Num. of seats: | 5 | 4 | 5 |
| Fuel consumption / economy - urban: | 16.8 l/100 km | 8.8 l/100 km | 15.7 l/100 km |
| Fuel consumption / economy - extra urban: | 11.2 l/100 km | 5.5 l/100 km | 8 l/100 km |
| Fuel consumption / economy - combined: | 13.8 l/100 km | 6.7 l/100 km | 10.8 l/100 km |
| Fuel Type: | Petrol (Gasoline) | Petrol (Gasoline) | Petrol (Gasoline) |
| Drag coefficient: | 0.47 | 0.28 | 0.28 |
| Fuel tank volume: | 68 l | 52 l | 88 l |
| Emission standard: | EURO III | ||
| CO2 emissions: | 161 g/km | ||
| Power: | 137 hp | 103 hp | 231 hp |
| Max power in: | 3800 rpm. | 6000 rpm. | 5900 rpm. |
| Maximum speed: | 195 km/h | 237 km/h | |
| Acceleration from 0 to 100 km/h: | 12 sec | 8.3 sec | |
| Torque: | 325 Nm @ 2000 rpm. | 150 Nm/3600 rpm. | 300 Nm @ 3500 rpm. |
| Engine position: | Front, longitudinal | Front, transverse | Front, longitudinal |
| Engine displacement: | 5001 cm3 | 1598 cm3 | 2979 cm3 |
| Fuel System: | Carburettor | Multi-point injection | Multi-point injection |
| Position of cylinders: | V engine | Inline | Inline |
| Valvetrain: | DOHC | DOHC | |
| Number of cylinders: | 8 | 4 | 6 |
| Number of valves per cylinder: | 2 | 4 | 4 |
| Compression ratio: | 8.5 | 10 | 10.2 |
| Piston Stroke: | 88.39 mm | 81.5 mm | 89.6 mm |
| Cylinder Bore: | 94.89 mm | 79 mm | 84 mm |
| Wheel Drive: | Rear wheel drive | Front wheel drive | Rear wheel drive |
| Number of Gears (automatic transmission): | 3 Hydramatic | 6 Steptronic | |
| Number of Gears (manual transmission): | 5 | ||
| Length: | 5080 mm | 4267 mm | 5169 mm |
| Width: | 1781 mm | 1709 mm | 1902 mm |
| Width including mirrors: | 1967 mm | ||
| Height: | 1356 mm | 1390 mm | 1492 mm |
| Wheelbase: | 2746 mm | 2606 mm | 3130 mm |
| Front track: | 1486 mm | 1474 mm | 1578 mm |
| Rear (Back) track: | 1468 mm | 1462 mm | 1582 mm |
| Ride height(clearance): | 130 mm | ||
| Front overhang: | 812 mm | ||
| Rear overhang: | 849 mm | ||
| Minimum volume of Luggage (trunk): | 462 l | 330 l | 500 l |
| Maximum amount of Luggage (trunk): | 1100 l | ||
| Front suspension: | Independent, spring | Wishbone | The depreciated rack |
| Rear suspension: | Suspension De-Dion | Helical spring | Helical spring |
| Max weight: | 1695 kg | 2440 kg | |
| Front brakes: | Disc | Ventilated discs | Ventilated discs |
| Rear brakes: | Drum | Disc | Disc |
| Kerb Weight: | 1485 kg | 1250 kg | 1745 kg |
| ABS: | yes | yes | |
| Steering type: | Cone worm with recirculation balls | Steering rack and pinion | Steering rack and pinion |
| Power steering: | Hydraulic Steering | Hydraulic Steering | |
| Minimum turning circle (turning diameter): | 12.8 m | 12.6 m | |
| Tire size: | 195/75 R14 | 195/60 R15 | 245/55 R17 |
| Wheel rims size: | R14 | R15 | R17 |