Comparison BMW 6 Series Convertible (E64) 630i (258 Hp) Automatic & Renault 21 (B48) 2.0 i 12V (140 Hp)
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| Brand: | BMW | Renault |
| Model: | 6 Series | 21 |
| Generation: | 6 Series Convertible (E64) | 21 (B48) |
| Engine / modification: | 630i (258 Hp) Automatic | 2.0 i 12V (140 Hp) |
| Production start: | 2004 year | 1989 year |
| Production end: | 2007 year | 1993 year |
| Coupe type: | Cabriolet | Sedan |
| Num. of Doors: | 2 | 4 |
| Num. of seats: | 2+2 | 5 |
| Fuel consumption / economy - urban: | 14.2 l/100 km | 12.4 l/100 km |
| Fuel consumption / economy - extra urban: | 7.5 l/100 km | 6.8 l/100 km |
| Fuel consumption / economy - combined: | 9.9 l/100 km | 8.4 l/100 km |
| Fuel Type: | Petrol (Gasoline) | Petrol (Gasoline) |
| Drag coefficient: | 0.31 | |
| Fuel tank volume: | 70 l | 66 l |
| Emission standard: | Euro 4 | |
| Power: | 258 hp | 140 hp |
| Max power in: | 6600 rpm. | 6000 rpm. |
| Maximum speed: | 250 km/h | 203 km/h |
| Acceleration from 0 to 100 km/h: | 7.2 sec | 9.6 sec |
| Torque: | 300 Nm @ 2500 rpm. | 176 Nm @ 4300 rpm. |
| Model Engine: | N52B30 | J7R |
| Engine position: | Front, longitudinal | Front, longitudinal |
| Engine displacement: | 2996 cm3 | 1995 cm3 |
| Engine oil capacity: | 6.5 l | 5.5 l |
| Coolant: | 6.8 l | |
| Fuel System: | Multi-point injection | Multi-point injection |
| Position of cylinders: | Inline | Inline |
| Valvetrain: | DOHC | OHC |
| Number of cylinders: | 6 | 4 |
| Number of valves per cylinder: | 4 | 3 |
| Compression ratio: | 10.7 | 9.3 |
| Piston Stroke: | 88 mm | 82 mm |
| Cylinder Bore: | 85 mm | 88 mm |
| Wheel Drive: | Rear wheel drive | Front wheel drive |
| Number of Gears (automatic transmission): | 6 | - |
| Number of Gears (manual transmission): | 5 | |
| Length: | 4820 mm | 4530 mm |
| Width: | 1855 mm | 1730 mm |
| Height: | 1373 mm | 1415 mm |
| Wheelbase: | 2780 mm | 2660 mm |
| Front track: | 1558 mm | 1430 mm |
| Rear (Back) track: | 1596 mm | 1400 mm |
| Minimum volume of Luggage (trunk): | 300 l | 490 l |
| Maximum amount of Luggage (trunk): | 350 l | |
| Front suspension: | Coil spring | The depreciated rack |
| Rear suspension: | Helical spring | Torsion |
| Max weight: | 2100 kg | 1605 kg |
| Front brakes: | Ventilated discs | Ventilated discs |
| Rear brakes: | Disc | Drum |
| Kerb Weight: | 1700 kg | 1140 kg |
| ABS: | yes | yes |
| Steering type: | Steering rack and pinion | Steering rack and pinion |
| Power steering: | Hydraulic Steering | Hydraulic Steering |
| Minimum turning circle (turning diameter): | 11.4 m | |
| Tire size: | 245/40 R17 | 175/70 R13 |
| Wheel rims size: | R17 | R13 |