Comparison BMW M8 Convertible Competition 4.4 V8 (625 Hp) xDrive Steptronic & Alfa Romeo 156 Sport Wagon (facelift 2003) 1.6 i 16V T.Spark (120 Hp)
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| Brand: | BMW | Alfa Romeo |
| Model: | M8 | 156 |
| Generation: | M8 Convertible | 156 Sport Wagon (facelift 2003) |
| Engine / modification: | Competition 4.4 V8 (625 Hp) xDrive Steptronic | 1.6 i 16V T.Spark (120 Hp) |
| Production start: | 2019 year | 2003 year |
| Production end: | 2006 year | |
| Coupe type: | Cabriolet | Combi |
| Num. of Doors: | 2 | 5 |
| Num. of seats: | 4 | 5 |
| Fuel consumption / economy - urban: | 15.1-15.2 l/100 km | 11.5 l/100 km |
| Fuel consumption / economy - extra urban: | 7.9-8.3 l/100 km | 6.5 l/100 km |
| Fuel consumption / economy - combined: | 10.6-10.8 l/100 km | 8.3 l/100 km |
| Fuel Type: | Petrol (Gasoline) | Petrol (Gasoline) |
| Fuel tank volume: | 68 l | 63 l |
| Emission standard: | Euro 6 d-TEMP | |
| CO2 emissions: | 241-246 g/km | |
| Power: | 625 hp | 120 hp |
| Max power in: | 6000 rpm. | 6200 rpm. |
| Maximum speed: | 250 km/h | 200 km/h |
| Acceleration from 0 to 100 km/h: | 3.3 sec | 11.6 sec |
| Acceleration from 0 to 200 km/h: | 11.1 sec | |
| Torque: | 750 Nm @ 1800-5800 rpm. | 146 Nm @ 4200 rpm. |
| Model Engine: | AR 67601 | |
| Engine position: | Front, longitudinal | Front, transverse |
| Engine displacement: | 4395 cm3 | 1598 cm3 |
| Engine oil capacity: | 10.0 l | 4.4 l |
| Coolant: | 6.9 l | |
| Fuel System: | Direct injection | Multi-point injection |
| Aspiration / Turbine: | Twin-power turbo | |
| Position of cylinders: | V engine | Inline |
| Valvetrain: | DOHC | |
| Number of cylinders: | 8 | 4 |
| Number of valves per cylinder: | 4 | 4 |
| Compression ratio: | 10 | 10.3 |
| Piston Stroke: | 88.3 mm | 75.7 mm |
| Cylinder Bore: | 89 mm | 82 mm |
| Wheel Drive: | All wheel drive (4x4) | Front wheel drive |
| Number of Gears (automatic transmission): | 8 M Steptronic | - |
| Number of Gears (manual transmission): | 5 | |
| Length: | 4867 mm | 4441 mm |
| Width: | 1907 mm | 1743 mm |
| Width including mirrors: | 2137 mm | |
| Height: | 1353 mm | 1430 mm |
| Wheelbase: | 2827 mm | 2595 mm |
| Front track: | 1627 mm | 1519 mm |
| Rear (Back) track: | 1632 mm | 1506 mm |
| Front overhang: | 950 mm | |
| Rear overhang: | 1090 mm | |
| Minimum volume of Luggage (trunk): | 360 l | |
| Maximum amount of Luggage (trunk): | 350 l | 1180 l |
| Front suspension: | Double wishbone | Double wishbone |
| Rear suspension: | Multi-link independent | Double wishbone |
| Max weight: | 2440 kg | 1795 kg |
| Front brakes: | Ventilated discs | Ventilated discs |
| Rear brakes: | Ventilated discs | Disc |
| Kerb Weight: | 2010 kg | 1315 kg |
| ABS: | yes | yes |
| Steering type: | Steering rack and pinion | Steering rack and pinion |
| Power steering: | Electric Steering | |
| Minimum turning circle (turning diameter): | 12.2 m | |
| Tire size: | Front wheel tires: 275/35 ZR20 102Y XL | 185/65 R15 |
| Wheel rims size: | Front wheel rims: 9.5J x 20 | 6J x 15 |