Comparison BMW 6 Series (E63, facelift 2007) 630i (272 Hp) & Renault 21 (B48) 2.0 i (120 Hp)
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| Brand: | BMW | Renault |
| Model: | 6 Series | 21 |
| Generation: | 6 Series (E63, facelift 2007) | 21 (B48) |
| Engine / modification: | 630i (272 Hp) | 2.0 i (120 Hp) |
| Production start: | 2007 year | 1989 year |
| Production end: | 2010 year | 1993 year |
| Coupe type: | Coupe | Sedan |
| Num. of Doors: | 2 | 4 |
| Num. of seats: | 2+2 | 5 |
| Fuel consumption / economy - urban: | 11.2 l/100 km | 11.8 l/100 km |
| Fuel consumption / economy - extra urban: | 6.0 l/100 km | 6.5 l/100 km |
| Fuel consumption / economy - combined: | 7.9 l/100 km | 7.9 l/100 km |
| Fuel Type: | Petrol (Gasoline) | Petrol (Gasoline) |
| Drag coefficient: | 0.30 | |
| Fuel tank volume: | 70 l | 66 l |
| Emission standard: | Euro 4 | |
| CO2 emissions: | 188 g/km | |
| Power: | 272 hp | 120 hp |
| Max power in: | 6700 rpm. | 5500 rpm. |
| Maximum speed: | 250 km/h | 192 km/h |
| Acceleration from 0 to 100 km/h: | 6.2 sec | 9.9 sec |
| Torque: | 320 Nm @ 2750-3000 rpm. | 168 Nm @ 4500 rpm. |
| Model Engine: | N53B30 | J7R 746, J7R 747 |
| Engine position: | Front, longitudinal | Front, transverse |
| Engine displacement: | 2996 cm3 | 1995 cm3 |
| Engine oil capacity: | 6.5 l | 5.5 l |
| Coolant: | 10.0 l | 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 | 2 |
| Compression ratio: | 12 | 10 |
| 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): | 4 | |
| Number of Gears (manual transmission): | 6 | 5 |
| Length: | 4820 mm | 4530 mm |
| Width: | 1855 mm | 1730 mm |
| Height: | 1374 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): | 450 l | 490 l |
| Front suspension: | Double wishbone | The depreciated rack |
| Rear suspension: | Multi-link independent | Torsion |
| Max weight: | 1980 kg | 1570 kg |
| Front brakes: | Ventilated discs | Ventilated discs |
| Rear brakes: | Ventilated discs | Drum |
| Kerb Weight: | 1530 kg | 1080 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: | 245/50 R17 99W RSC | 185/65 R14 |
| Wheel rims size: | 7.5 J x 17 | R14 |