Comparison BMW 6 Series Convertible (E64, facelift 2007) 630i (272 Hp) Steptronic & BMW 4 Series Coupe (G22) 420d (190 Hp) MHEV xDrive Steptronic
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| Brand: | BMW | BMW |
| Model: | 6 Series | 4 Series |
| Generation: | 6 Series Convertible (E64, facelift 2007) | 4 Series Coupe (G22) |
| Engine / modification: | 630i (272 Hp) Steptronic | 420d (190 Hp) MHEV xDrive Steptronic |
| Production start: | 2007 year | 2020 year |
| Production end: | 2010 year | |
| Coupe type: | Cabriolet | Coupe |
| Num. of Doors: | 2 | 2 |
| Num. of seats: | 2+2 | 4 |
| Fuel consumption / economy - urban: | 11.6 l/100 km | 4.8-5.2 l/100 km |
| Fuel consumption / economy - extra urban: | 6.0 l/100 km | 4.0-4.2 l/100 km |
| Fuel consumption / economy - combined: | 8.1 l/100 km | 4.3-4.6 l/100 km |
| Fuel Type: | Petrol (Gasoline) | Diesel |
| Drag coefficient: | 0.31 | 0.25 |
| Fuel tank volume: | 70 l | 59 l |
| Combined fuel consumption (WLTP): | 4.8-5.5 l/100 km | |
| Emission standard: | Euro 4 | EURO 6d |
| CO2 emissions: | 192 g/km | 112-121 g/km |
| Power: | 272 hp | 190 hp |
| Max power in: | 6700 rpm. | 4000 rpm. |
| Maximum speed: | 250 , Electronically limited km/h | 238 km/h |
| Acceleration from 0 to 100 km/h: | 7.0 sec | 7.4 sec |
| CO2 emissions (WLTP): | 126-145 g/km | |
| Torque: | 320 Nm @ 2750-3000 rpm. | 400 Nm @ 1750-2500 rpm. |
| Model Engine: | N53B30 | |
| Engine position: | Front, longitudinal | Front, longitudinal |
| Engine displacement: | 2996 cm3 | 1995 cm3 |
| Engine oil capacity: | 6.5 l | 5.5 l |
| Coolant: | 10.5 l | |
| Fuel System: | Direct injection | Diesel Commonrail |
| Aspiration / Turbine: | Twin-power turbo | |
| Position of cylinders: | Inline | Inline |
| Valvetrain: | DOHC, Double-VANOS | |
| Number of cylinders: | 6 | 4 |
| Number of valves per cylinder: | 4 | 4 |
| Compression ratio: | 12 | 16.5 |
| Piston Stroke: | 88 mm | 90 mm |
| Cylinder Bore: | 85 mm | 84 mm |
| Electric motor power: | 11 | |
| Battery capacity: | 0.528 kWh | |
| Wheel Drive: | Rear wheel drive | All wheel drive (4x4) |
| Number of Gears (automatic transmission): | 6 Steptronic | 8 Steptronic |
| Length: | 4820 mm | 4768 mm |
| Width: | 1855 mm | 1852 mm |
| Width including mirrors: | 2036 mm | 2081 mm |
| Height: | 1373 mm | 1390 mm |
| Wheelbase: | 2780 mm | 2851 mm |
| Front track: | 1558 mm | 1575 mm |
| Rear (Back) track: | 1596 mm | 1611 mm |
| Ride height(clearance): | 126 mm | |
| Front overhang: | 942 mm | 858 mm |
| Rear overhang: | 1098 mm | 1059 mm |
| Minimum volume of Luggage (trunk): | 300 l | 440 l |
| Maximum amount of Luggage (trunk): | 350 l | |
| Front suspension: | Double wishbone | Double wishbone |
| Rear suspension: | Multi-link independent | Multi-link independent |
| Max weight: | 2150 kg | 2165 kg |
| Front brakes: | Ventilated discs | Ventilated discs |
| Rear brakes: | Ventilated discs | Ventilated discs |
| Kerb Weight: | 1750 kg | 1670 kg |
| ABS: | yes | |
| Steering type: | Steering rack and pinion | Steering rack and pinion |
| Power steering: | Hydraulic Steering | Electric Steering |
| Max. roof load: | 75 kg | |
| Minimum turning circle (turning diameter): | 11.4 m | 12.0 m |
| Permitted trailer load with brakes (12%): | 1800 kg | |
| Permitted trailer load without brakes: | 750 kg | |
| Permitted towbar download: | 75 kg | |
| Tire size: | Front wheel tires: 245/50 R17; 245/45 R18; 245/40 R19 | 225/50 R17 98Y XL |
| Wheel rims size: | Front wheel rims: 7.5J x 17; 8J x 18; 8.5J x 19 | 7.5J x 17 |