Comparison BMW M8 Convertible (F91, facelift 2022) Competition 4.4 V8 (625 Hp) xDrive Steptronic Sport & Opel Astra H TwinTop 1.6i 16V Turbo (180 Hp)
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| Brand: | BMW | Opel |
| Model: | M8 | Astra |
| Generation: | M8 Convertible (F91, facelift 2022) | Astra H TwinTop |
| Engine / modification: | Competition 4.4 V8 (625 Hp) xDrive Steptronic Sport | 1.6i 16V Turbo (180 Hp) |
| Production start: | 2022 year | 2006 year |
| Production end: | 2010 year | |
| Coupe type: | Cabriolet | Coupe - Cabriolet |
| Powertrain Architecture: | Internal Combustion engine | |
| Num. of Doors: | 2 | 2 |
| Num. of seats: | 4 | 4 |
| Fuel consumption / economy - urban: | 13 l/100 km | |
| Fuel consumption / economy - extra urban: | 7 l/100 km | |
| Fuel consumption / economy - combined: | 9.2 l/100 km | |
| Fuel Type: | Petrol (Gasoline) | Petrol (Gasoline) |
| Drag coefficient: | 0.31 | |
| Fuel tank volume: | 68 l | 52 l |
| Combined fuel consumption (WLTP): | 11.2-11.6 l/100 km | |
| Emission standard: | Euro 6d | |
| CO2 emissions: | 221 g/km | |
| Power: | 625 hp | 180 hp |
| Max power in: | 6000 rpm. | 5500 rpm. |
| Maximum speed: | 250 , Electronically limited km/h | 224 km/h |
| Acceleration from 0 to 100 km/h: | 3.3 sec | 9.5 sec |
| CO2 emissions (WLTP): | 255-264 g/km | |
| Torque: | 750 Nm @ 1800-5860 rpm. | 230 Nm @ 1980 rpm. |
| Model Engine: | S63B44B | Z16LET |
| Engine position: | Front, longitudinal | Front, transverse |
| Engine displacement: | 4395 cm3 | 1598 cm3 |
| Engine oil capacity: | 10 l | 4.5 l |
| Fuel System: | Direct injection | Multi-point injection |
| Aspiration / Turbine: | BiTurbo | Turbocharging |
| Position of cylinders: | V engine | Inline |
| Valvetrain: | DOHC | |
| Number of cylinders: | 8 | 4 |
| Number of valves per cylinder: | 4 | 4 |
| Compression ratio: | 10 | 10.5 |
| Piston Stroke: | 88.3 mm | 81.5 mm |
| Cylinder Bore: | 89 mm | 79 mm |
| Wheel Drive: | All wheel drive (4x4) | Front wheel drive |
| Number of Gears (automatic transmission): | 8 Steptronic Sport | |
| Number of Gears (manual transmission): | 6 | |
| Length: | 4867 mm | 4476 mm |
| Width: | 1907 mm | 1759 mm |
| Width with mirrors folded: | 1831 mm | |
| Width including mirrors: | 2137 mm | 2021 mm |
| Height: | 1353 mm | 1411 mm |
| Wheelbase: | 2827 mm | 2614 mm |
| Front track: | 1627 mm | 1488 mm |
| Rear (Back) track: | 1632 mm | 1481 mm |
| Ride height(clearance): | 122 mm | |
| Front overhang: | 950 mm | 909 mm |
| Rear overhang: | 1090 mm | 953 mm |
| Minimum volume of Luggage (trunk): | 280-350 l | 205 l |
| Maximum amount of Luggage (trunk): | 440 l | |
| Front suspension: | Double wishbone | Coil spring |
| Rear suspension: | Multi-link independent | Transverse stabilizer |
| Max weight: | 2440 kg | 1975 kg |
| Front brakes: | Ventilated discs | Ventilated discs |
| Rear brakes: | Ventilated discs | Disc |
| Kerb Weight: | 2025 kg | 1505 kg |
| ABS: | yes | |
| Steering type: | Steering rack and pinion | Steering rack and pinion |
| Power steering: | Electric Steering | |
| Minimum turning circle (turning diameter): | 12.2 m | 11.2 m |
| Tire size: | 275/35 ZR20; 285/35 ZR20 | 225/45 R17 |
| Wheel rims size: | 9.5J x 20; 10.5J x 20 | R17 |