Comparison BMW 6 Series Convertible (E64, facelift 2007) 650i (367 Hp) Automatic & BMW 6 Series Coupe (F13 LCI, facelift 2015) 640i (320 Hp) xDrive Steptronic & Volvo C70 Coupe Cabrio II 2.5 T5 20V (230 Hp)
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| Brand: | BMW | BMW | Volvo |
| Model: | 6 Series | 6 Series | C70 |
| Generation: | 6 Series Convertible (E64, facelift 2007) | 6 Series Coupe (F13 LCI, facelift 2015) | C70 Coupe Cabrio II |
| Engine / modification: | 650i (367 Hp) Automatic | 640i (320 Hp) xDrive Steptronic | 2.5 T5 20V (230 Hp) |
| Production start: | 2007 year | 2015 year | 2006 year |
| Production end: | 2010 year | 2018 year | 2009 year |
| Coupe type: | Cabriolet | Coupe | Coupe - Cabriolet |
| Num. of Doors: | 2 | 2 | 2 |
| Num. of seats: | 2+2 | 4 | 4 |
| Fuel consumption / economy - urban: | 16.5 l/100 km | 10.9-11.4 l/100 km | |
| Fuel consumption / economy - extra urban: | 7.7 l/100 km | 6.1-6.3 l/100 km | |
| Fuel consumption / economy - combined: | 10.9 l/100 km | 7.9-8.2 l/100 km | 9.1 l/100 km |
| Fuel Type: | Petrol (Gasoline) | Petrol (Gasoline) | Petrol (Gasoline) |
| Drag coefficient: | 0.31 | 0.29 | |
| Fuel tank volume: | 70 l | 70 l | 62 l |
| Emission standard: | Euro 4 | Euro 6 | |
| CO2 emissions: | 258 g/km | 183-191 g/km | 217 g/km |
| Power: | 367 hp | 320 hp | 230 hp |
| Max power in: | 6300 rpm. | 5800-6000 rpm. | 5000 rpm. |
| Maximum speed: | 250 km/h | 250 km/h | 240 km/h |
| Acceleration from 0 to 100 km/h: | 5.6 sec | 5.2 sec | 7.6 sec |
| Torque: | 490 Nm @ 3400 rpm. | 450 Nm @ 1300-4500 rpm. | 320 Nm @ 1500-5000 rpm. |
| Model Engine: | N62B48 | N55B30 | B5254T7 |
| Engine position: | Front, longitudinal | Front, longitudinal | |
| Engine displacement: | 4799 cm3 | 2979 cm3 | 2521 cm3 |
| Engine oil capacity: | 8.0 l | 6.5 l | 5.8 l |
| Coolant: | 14.2 l | 10.2 l | 9.5 l |
| Fuel System: | Multi-point injection | Direct injection | |
| Aspiration / Turbine: | Twin-power turbo | ||
| Position of cylinders: | V engine | Inline | Inline |
| Number of cylinders: | 8 | 6 | 5 |
| Number of valves per cylinder: | 4 | 4 | 4 |
| Compression ratio: | 10.5 | 10.2 | 9 |
| Piston Stroke: | 88.3 mm | 89.6 mm | 93.2 mm |
| Cylinder Bore: | 93 mm | 84 mm | 83 mm |
| Wheel Drive: | Rear wheel drive | All wheel drive (4x4) | Front wheel drive |
| Number of Gears (automatic transmission): | 6 | 8 Steptronic | |
| Number of Gears (manual transmission): | 6 | ||
| Length: | 4820 mm | 4894 mm | 4582 mm |
| Width: | 1855 mm | 1894 mm | 1770 mm |
| Width including mirrors: | 2025 mm | ||
| Height: | 1374 mm | 1369 mm | 1400 mm |
| Wheelbase: | 2780 mm | 2855 mm | 2640 mm |
| Front track: | 1558 mm | 1600 mm | 1550 mm |
| Rear (Back) track: | 1596 mm | 1665 mm | 1560 mm |
| Ride height(clearance): | 124 mm | ||
| Minimum volume of Luggage (trunk): | 300 l | 460 l | 200 l |
| Maximum amount of Luggage (trunk): | 350 l | 404 l | |
| Front suspension: | Double wishbone | Double wishbone | Coil spring |
| Rear suspension: | Multi-link independent | Multi-link independent | Helical spring |
| Max weight: | 2260 kg | 2265 kg | |
| Front brakes: | Ventilated discs | Disc | Ventilated discs |
| Rear brakes: | Ventilated discs | Disc | Disc |
| Kerb Weight: | 1860 kg | 1765 kg | |
| ABS: | yes | 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 | 11.7 m | |
| Tire size: | 245/45 R18 96W RSC | 225/55 R17; 245/45 R18; 275/45 R18; 245/40 R19; 275/35 R19; 245/35 R20; 275/30 R20 | 215/50 R17 |
| Wheel rims size: | 8 J x 18 | 8J x 17; 8J x 18; 9J x 18; 8.5J x 19; 9J x 19; 8.5J x 20; 9J x 20 | R17 |