Comparison BMW 6 Series Convertible (F12) 640i (320 Hp) Steptronic & BMW 2 Series Coupe (F22) M235i (326 Hp)
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| Brand: | BMW | BMW |
| Model: | 6 Series | 2 Series |
| Generation: | 6 Series Convertible (F12) | 2 Series Coupe (F22) |
| Engine / modification: | 640i (320 Hp) Steptronic | M235i (326 Hp) |
| Production start: | 2011 year | 2014 year |
| Production end: | 2015 year | 2016 year |
| Coupe type: | Cabriolet | Coupe |
| Num. of Doors: | 2 | 2 |
| Num. of seats: | 4 | 4 |
| Fuel consumption / economy - urban: | 10.9 l/100 km | 10.9 l/100 km |
| Fuel consumption / economy - extra urban: | 6.2 l/100 km | 6.4 l/100 km |
| Fuel consumption / economy - combined: | 7.9 l/100 km | 8.1 l/100 km |
| Fuel Type: | Petrol (Gasoline) | Petrol (Gasoline) |
| Drag coefficient: | 0.31 | 0.33 |
| Fuel tank volume: | 70 l | 52 l |
| Emission standard: | Euro 5 | Euro 6 |
| CO2 emissions: | 185 g/km | 189 g/km |
| Power: | 320 hp | 326 hp |
| Max power in: | 5800-6000 rpm. | 5800-6000 rpm. |
| Maximum speed: | 250 km/h | 250 km/h |
| Acceleration from 0 to 100 km/h: | 5.7 sec | 5.0 sec |
| Torque: | 450 Nm @ 1300-4500 rpm. | 450 Nm @ 1300-4500 rpm. |
| Model Engine: | N55B30 | N55B30 |
| Engine position: | Front, longitudinal | Front, longitudinal |
| Engine displacement: | 2979 cm3 | 2979 cm3 |
| Engine oil capacity: | 6.5 l | 6.5 l |
| Coolant: | 10.2 l | 6.7-7.2 l |
| Fuel System: | Direct injection | Direct injection |
| Aspiration / Turbine: | Twin-power turbo | Twin-power turbo |
| Position of cylinders: | Inline | Inline |
| Number of cylinders: | 6 | 6 |
| Number of valves per cylinder: | 4 | 4 |
| Compression ratio: | 10.2 | 10.2 |
| Piston Stroke: | 89.6 mm | 89.6 mm |
| Cylinder Bore: | 84 mm | 84 mm |
| Wheel Drive: | Rear wheel drive | Rear wheel drive |
| Number of Gears (automatic transmission): | 8 Steptronic | |
| Number of Gears (manual transmission): | 6 | |
| Length: | 4894 mm | 4454 mm |
| Width: | 1894 mm | 1774 mm |
| Height: | 1365 mm | 1408 mm |
| Wheelbase: | 2855 mm | 2690 mm |
| Front track: | 1600 mm | 1516 mm |
| Rear (Back) track: | 1665 mm | 1534 mm |
| Ride height(clearance): | 123 mm | 130 mm |
| Minimum volume of Luggage (trunk): | 300 l | 390 l |
| Maximum amount of Luggage (trunk): | 350 l | |
| Front suspension: | Double wishbone | Double wishbone |
| Rear suspension: | Multi-link independent | Multi-link independent |
| Max weight: | 2290 kg | 1965 kg |
| Front brakes: | Ventilated discs | Ventilated discs |
| Rear brakes: | Ventilated discs | Disc |
| Kerb Weight: | 1840 kg | 1455 kg |
| ABS: | yes | yes |
| Steering type: | Steering rack and pinion | Steering rack and pinion |
| Power steering: | Electric Steering | Electric Steering |
| Max. roof load: | 75 kg | |
| Minimum turning circle (turning diameter): | 11.7 m | 10.9 m |
| Tire size: | 225/55 R17 97Y | 225/40 R18 88Y; 245/35 R 18 92Y |
| Wheel rims size: | 8J x 17 | 7.5J x 18; 8J x 18 |