Comparison BMW 6 Series Convertible (E64, facelift 2007) 650i (367 Hp) & BMW X3 (F25 LCI, facelift 2014) 35i (306 Hp) xDrive Automatic & BMW 6 Series Convertible (F12 LCI, facelift 2015) 640i (320 Hp) xDrive Steptronic
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| Brand: | BMW | BMW | BMW |
| Model: | 6 Series | X3 | 6 Series |
| Generation: | 6 Series Convertible (E64, facelift 2007) | X3 (F25 LCI, facelift 2014) | 6 Series Convertible (F12 LCI, facelift 2015) |
| Engine / modification: | 650i (367 Hp) | 35i (306 Hp) xDrive Automatic | 640i (320 Hp) xDrive Steptronic |
| Production start: | 2007 year | 2014 year | 2015 year |
| Production end: | 2010 year | 2017 year | 2018 year |
| Coupe type: | Cabriolet | SUV | Cabriolet |
| Num. of Doors: | 2 | 5 | 2 |
| Num. of seats: | 2+2 | 5 | 4 |
| Fuel consumption / economy - urban: | 19.2 l/100 km | 10.7 l/100 km | 11.2-11.7 l/100 km |
| Fuel consumption / economy - extra urban: | 8.8 l/100 km | 6.9 l/100 km | 6.2-6.4 l/100 km |
| Fuel consumption / economy - combined: | 12.6 l/100 km | 8.3 l/100 km | 8.0-8.4 l/100 km |
| Fuel Type: | Petrol (Gasoline) | Petrol (Gasoline) | Petrol (Gasoline) |
| Drag coefficient: | 0.31 | 0.35 | 0.31 |
| Fuel tank volume: | 70 l | 67 l | 70 l |
| Emission standard: | Euro 4 | Euro 6 | Euro 6 |
| CO2 emissions: | 299 g/km | 193 g/km | 187-195 g/km |
| Power: | 367 hp | 306 hp | 320 hp |
| Max power in: | 6300 rpm. | 5800-6400 rpm. | 5800-6000 rpm. |
| Maximum speed: | 250 km/h | 245 km/h | 250 km/h |
| Acceleration from 0 to 100 km/h: | 5.5 sec | 5.6 sec | 5.4 sec |
| Torque: | 490 Nm @ 3400 rpm. | 400 Nm @ 1200-5000 rpm. | 450 Nm @ 1300-4500 rpm. |
| Model Engine: | N62B48 | N55B30 | N55B30 |
| Engine position: | Front, longitudinal | Front, longitudinal | Front, longitudinal |
| Engine displacement: | 4799 cm3 | 2979 cm3 | 2979 cm3 |
| Engine oil capacity: | 8.0 l | 6.5 l | 6.5 l |
| Coolant: | 13.8 l | 9.6 l | 10.2 l |
| Fuel System: | Multi-point injection | Direct injection | Direct injection |
| Aspiration / Turbine: | Twin-power turbo | Twin-power turbo | |
| Position of cylinders: | V engine | Inline | Inline |
| Number of cylinders: | 8 | 6 | 6 |
| Number of valves per cylinder: | 4 | 4 | 4 |
| Compression ratio: | 10.5 | 10.2 | 10.2 |
| Piston Stroke: | 88.3 mm | 89.6 mm | 89.6 mm |
| Cylinder Bore: | 93 mm | 84 mm | 84 mm |
| Wheel Drive: | Rear wheel drive | All wheel drive (4x4) | All wheel drive (4x4) |
| Number of Gears (automatic transmission): | 8 | 8 Steptronic | |
| Number of Gears (manual transmission): | 6 | ||
| Length: | 4820 mm | 4657 mm | 4894 mm |
| Width: | 1855 mm | 1881 mm | 1894 mm |
| Height: | 1374 mm | 1661 mm | 1365 mm |
| Wheelbase: | 2780 mm | 2810 mm | 2855 mm |
| Front track: | 1558 mm | 1594 mm | 1600 mm |
| Rear (Back) track: | 1596 mm | 1610 mm | 1665 mm |
| Ride height(clearance): | 204 mm | 123 mm | |
| Minimum volume of Luggage (trunk): | 300 l | 550 l | 300 l |
| Maximum amount of Luggage (trunk): | 350 l | 1600 l | 350 l |
| Front suspension: | Double wishbone | Independent, spring | Double wishbone |
| Rear suspension: | Multi-link independent | Multi-link independent | Multi-link independent |
| Max weight: | 2260 kg | 2405 kg | 2390 kg |
| Front brakes: | Ventilated discs | Ventilated discs | Disc |
| Rear brakes: | Ventilated discs | Ventilated discs | Disc |
| Kerb Weight: | 1860 kg | 1815 kg | 1890 kg |
| ABS: | yes | yes | yes |
| Steering type: | Steering rack and pinion | Steering rack and pinion | Steering rack and pinion |
| Power steering: | Hydraulic Steering | Electric Steering | Electric Steering |
| Max. roof load: | 100 kg | ||
| Minimum turning circle (turning diameter): | 11.4 m | 11.9 m | 11.7 m |
| Permitted trailer load with brakes (12%): | 2400 kg | ||
| Permitted trailer load without brakes: | 750 kg | ||
| Permitted towbar download: | 100 kg | ||
| Tire size: | 245/45 R18 96W RSC | 245/50 R18 100W | 225/55 R17; 245/45 R18; 275/45 R18; 245/40 R19; 275/35 R19; 245/35 R20; 275/30 R20 |
| Wheel rims size: | 8 J x 18 | 8.0J 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 |