Comparison BMW 6 Series Convertible (F12) 640d (313 Hp) Steptronic & BMW 2 Series Convertible (F23) 230i (252 Hp)
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| Brand: | BMW | BMW |
| Model: | 6 Series | 2 Series |
| Generation: | 6 Series Convertible (F12) | 2 Series Convertible (F23) |
| Engine / modification: | 640d (313 Hp) Steptronic | 230i (252 Hp) |
| Production start: | 2011 year | 2016 year |
| Production end: | 2015 year | 2017 year |
| Coupe type: | Cabriolet | Cabriolet |
| Num. of Doors: | 2 | 2 |
| Num. of seats: | 4 | 4 |
| Fuel consumption / economy - urban: | 6.8 l/100 km | 8.5-8.9 l/100 km |
| Fuel consumption / economy - extra urban: | 4.9 l/100 km | 5.3-5.5 l/100 km |
| Fuel consumption / economy - combined: | 5.6 l/100 km | 6.5-6.8 l/100 km |
| Fuel Type: | Diesel | Petrol (Gasoline) |
| Drag coefficient: | 0.31 | 0.33 |
| Fuel tank volume: | 70 l | 52 l |
| Emission standard: | Euro 5 | EURO VI |
| CO2 emissions: | 147-149 g/km | 149-155 g/km |
| Power: | 313 hp | 252 hp |
| Max power in: | 4400 rpm. | 5200 rpm. |
| Maximum speed: | 250 km/h | 250 km/h |
| Acceleration from 0 to 100 km/h: | 5.6 sec | 6.1 sec |
| Torque: | 630 Nm @ 1500-2500 rpm. | 350 Nm @ 1450-4800 rpm. |
| Model Engine: | N57D30 | |
| Engine position: | Front, longitudinal | Front, longitudinal |
| Engine displacement: | 2993 cm3 | 1998 cm3 |
| Engine oil capacity: | 6.5 l | 5.25 l |
| Coolant: | 8.0 l | |
| Fuel System: | Diesel Commonrail | Direct injection |
| Aspiration / Turbine: | Twin-power turbo | Twin-power turbo |
| Position of cylinders: | Inline | Inline |
| Number of cylinders: | 6 | 4 |
| Number of valves per cylinder: | 4 | 4 |
| Compression ratio: | 16.5 | 10.2 |
| Piston Stroke: | 90 mm | 94.6 mm |
| Cylinder Bore: | 84 mm | 82 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 | 4432 mm |
| Width: | 1894 mm | 1774 mm |
| Height: | 1365 mm | 1413 mm |
| Wheelbase: | 2855 mm | 2690 mm |
| Front track: | 1600 mm | 1521 mm |
| Rear (Back) track: | 1665 mm | 1556 mm |
| Ride height(clearance): | 123 mm | 140 mm |
| Minimum volume of Luggage (trunk): | 300 l | 280 l |
| Maximum amount of Luggage (trunk): | 350 l | 335 l |
| Front suspension: | Double wishbone | Independent, spring |
| Rear suspension: | Double wishbone | Multi-link independent |
| Max weight: | 2340 kg | 1980 kg |
| Front brakes: | Ventilated discs | Ventilated discs |
| Rear brakes: | Ventilated discs | Disc |
| Kerb Weight: | 1860 kg | 1540 kg |
| ABS: | yes | yes |
| Steering type: | Steering rack and pinion | Steering rack and pinion |
| Power steering: | Electric Steering | Electric Steering |
| Minimum turning circle (turning diameter): | 11.7 m | 10.9 m |
| Permitted trailer load with brakes (12%): | 1500 kg | |
| Permitted trailer load without brakes: | 750 kg | |
| Permitted towbar download: | 75 kg | |
| Tire size: | 225/55 R17; 245/45 R18; 275/45 R18; 245/40 R19; 275/35 R19 | 205/50 R17; 225/45 R17; 245/40 R17; 225/40 R18; 245/35 R18 |
| Wheel rims size: | 8J x 17; 8J x 18; 9J x 18; 8.5J x 19; 9J x 19 | 7J x 17; 7.5J x 17; 8J x 17; 7.5J x 18; 8J x 18 |