Comparison BMW 6 Series Coupe (F13) 650i (450 Hp) xDrive Steptronic & BMW 3 Series Convertible (E93) 320i (170 Hp)
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| Brand: | BMW | BMW |
| Model: | 6 Series | 3 Series |
| Generation: | 6 Series Coupe (F13) | 3 Series Convertible (E93) |
| Engine / modification: | 650i (450 Hp) xDrive Steptronic | 320i (170 Hp) |
| Production start: | 2012 year | 2007 year |
| Production end: | 2015 year | 2010 year |
| Coupe type: | Coupe | Cabriolet |
| Num. of Doors: | 2 | 2 |
| Num. of seats: | 4 | 4 |
| Fuel consumption / economy - urban: | 12.7-13.0 l/100 km | 9.0 l/100 km |
| Fuel consumption / economy - extra urban: | 7.1-7.2 l/100 km | 5.2 l/100 km |
| Fuel consumption / economy - combined: | 9.2-9.3 l/100 km | 6.6 l/100 km |
| Fuel Type: | Petrol (Gasoline) | Petrol (Gasoline) |
| Drag coefficient: | 0.32 | |
| Fuel tank volume: | 70 l | 63 l |
| Emission standard: | Euro 5 | Euro 4 |
| CO2 emissions: | 213-217 g/km | |
| Power: | 450 hp | 170 hp |
| Max power in: | 5500 rpm. | 6700 rpm. |
| Maximum speed: | 250 km/h | 228 km/h |
| Acceleration from 0 to 100 km/h: | 4.4 sec | 9.1 sec |
| Torque: | 650 Nm @ 2000-4500 rpm. | 210 Nm @ 4250 rpm. |
| Model Engine: | N63B44 | N43B20 |
| Engine position: | Front, longitudinal | Front, longitudinal |
| Engine displacement: | 4395 cm3 | 1995 cm3 |
| Engine oil capacity: | 9.5 l | 4.3 l |
| Coolant: | 14.4 l | 8.4 l |
| Fuel System: | Direct injection | Multi-point injection |
| Aspiration / Turbine: | Twin-power turbo | |
| Position of cylinders: | V engine | Inline |
| Valvetrain: | - | |
| Number of cylinders: | 8 | 4 |
| Number of valves per cylinder: | 4 | 4 |
| Compression ratio: | 10 | 12 |
| Piston Stroke: | 88.3 mm | 90 mm |
| Cylinder Bore: | 89 mm | 84 mm |
| Wheel Drive: | All wheel drive (4x4) | Rear wheel drive |
| Number of Gears (automatic transmission): | 8 Steptronic | |
| Number of Gears (manual transmission): | 6 | |
| Length: | 4894 mm | 4580 mm |
| Width: | 1894 mm | 1782 mm |
| Height: | 1369 mm | 1384 mm |
| Wheelbase: | 2855 mm | 2760 mm |
| Front track: | 1600 mm | 1500 mm |
| Rear (Back) track: | 1665 mm | 1513 mm |
| Ride height(clearance): | 124 mm | 138 mm |
| Minimum volume of Luggage (trunk): | 460 l | 210 l |
| Maximum amount of Luggage (trunk): | 350 l | |
| Front suspension: | Double wishbone | Coil spring |
| Rear suspension: | Multi-link independent | Helical spring |
| Max weight: | 2350 kg | 2025 kg |
| Front brakes: | Ventilated discs | Ventilated discs |
| Rear brakes: | Ventilated discs | Disc |
| Kerb Weight: | 1855 kg | 1600 kg |
| ABS: | yes | yes |
| Steering type: | Steering rack and pinion | Steering rack and pinion |
| Power steering: | Electric Steering | |
| Max. roof load: | 75 kg | |
| Minimum turning circle (turning diameter): | 11.7 m | |
| Tire size: | 245/45 R18; 275/45 R18; 245/40 R19; 275/35 R19; 245/35 R20; 275/30 R20 | 225/45 R17 |
| Wheel rims size: | 8J x 18; 9J x 18; 8.5J x 19; 9J x 19; 8.5J x 20; 9J x 20 | 8J x 17 |