Comparison BMW 6 Series Convertible (F12 LCI, facelift 2015) 640i (320 Hp) Steptronic & BMW X3 (E83, facelift 2006) 30i (272 Hp) xDrive Automatic
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| Brand: | BMW | BMW |
| Model: | 6 Series | X3 |
| Generation: | 6 Series Convertible (F12 LCI, facelift 2015) | X3 (E83, facelift 2006) |
| Engine / modification: | 640i (320 Hp) Steptronic | 30i (272 Hp) xDrive Automatic |
| Production start: | 2015 year | 2008 year |
| Production end: | 2018 year | 2010 year |
| Coupe type: | Cabriolet | SUV |
| Num. of Doors: | 2 | 5 |
| Num. of seats: | 4 | 5 |
| Fuel consumption / economy - urban: | 10.6-11.0 l/100 km | 13.3 l/100 km |
| Fuel consumption / economy - extra urban: | 5.8-6.1 l/100 km | 7.6 l/100 km |
| Fuel consumption / economy - combined: | 7.6-7.9 l/100 km | 9.7 l/100 km |
| Fuel Type: | Petrol (Gasoline) | Petrol (Gasoline) |
| Drag coefficient: | 0.30 | 0.34 |
| Fuel tank volume: | 70 l | 67 l |
| Emission standard: | Euro 6 | Euro 4 |
| CO2 emissions: | 176-184 g/km | 233 g/km |
| Power: | 320 hp | 272 hp |
| Max power in: | 5800-6000 rpm. | 6650 rpm. |
| Maximum speed: | 250 km/h | 232 km/h |
| Acceleration from 0 to 100 km/h: | 5.5 sec | 7.5 sec |
| Torque: | 450 Nm @ 1300-4500 rpm. | 315 Nm @ 2750 rpm. |
| Model Engine: | N55B30 | N52B30 |
| Engine position: | Front, longitudinal | Front, longitudinal |
| Engine displacement: | 2979 cm3 | 2996 cm3 |
| Engine oil capacity: | 6.5 l | 6.5 l |
| Coolant: | 10.2 l | 10.65 l |
| Fuel System: | Direct injection | Multi-point injection |
| Aspiration / Turbine: | Twin-power turbo | |
| Position of cylinders: | Inline | Inline |
| Number of cylinders: | 6 | 6 |
| Number of valves per cylinder: | 4 | 4 |
| Compression ratio: | 10.2 | 10.7 |
| Piston Stroke: | 89.6 mm | 88 mm |
| Cylinder Bore: | 84 mm | 85 mm |
| Wheel Drive: | Rear wheel drive | All wheel drive (4x4) |
| Number of Gears (automatic transmission): | 8 Steptronic | 6 |
| Length: | 4894 mm | 4569 mm |
| Width: | 1894 mm | 1853 mm |
| Height: | 1365 mm | 1674 mm |
| Wheelbase: | 2855 mm | 2795 mm |
| Front track: | 1600 mm | 1524 mm |
| Rear (Back) track: | 1665 mm | 1542 mm |
| Ride height(clearance): | 123 mm | 201 mm |
| Approach angle: | 23.9 ° | |
| Departure angle: | 21.8 ° | |
| Ramp angle: | 17.2 ° | |
| Wading depth: | 500 mm | |
| Minimum volume of Luggage (trunk): | 300 l | 480 l |
| Maximum amount of Luggage (trunk): | 350 l | 1560 l |
| Front suspension: | Double wishbone | |
| Rear suspension: | Multi-link independent | |
| Max weight: | 2325 kg | 2300 kg |
| Front brakes: | Disc | Ventilated discs |
| Rear brakes: | Disc | Ventilated discs |
| Kerb Weight: | 1820 kg | 1740 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 | 11.7 m |
| Permitted trailer load with brakes (12%): | 2000 kg | |
| Permitted trailer load without brakes: | 720 kg | |
| Permitted towbar download: | 80 kg | |
| Tire size: | 225/55 R17; 245/45 R18; 275/45 R18; 245/40 R19; 275/35 R19; 245/35 R20; 275/30 R20 | 235/55 R17 |
| Wheel rims size: | 8J x 17; 8J x 18; 9J x 18; 8.5J x 19; 9J x 19; 8.5J x 20; 9J x 20 | 8J x 17 |