Comparison BMW 6 Series Convertible (F12 LCI, facelift 2015) 640d (313 Hp) Steptronic & BMW 4 Series Gran Coupe (F36, facelift 2017) 440i (326 Hp) xDrive Steptronic
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| Brand: | BMW | BMW |
| Model: | 6 Series | 4 Series |
| Generation: | 6 Series Convertible (F12 LCI, facelift 2015) | 4 Series Gran Coupe (F36, facelift 2017) |
| Engine / modification: | 640d (313 Hp) Steptronic | 440i (326 Hp) xDrive Steptronic |
| Production start: | 2015 year | 2017 year |
| Production end: | 2018 year | |
| Coupe type: | Cabriolet | Coupe |
| Num. of Doors: | 2 | 4 |
| Num. of seats: | 4 | 5 |
| Fuel consumption / economy - urban: | 6.2-6.7 l/100 km | 9.5-9.9 l/100 km |
| Fuel consumption / economy - extra urban: | 5.0-5.3 l/100 km | 5.7-5.9 l/100 km |
| Fuel consumption / economy - combined: | 5.4-5.8 l/100 km | 7.1-7.4 l/100 km |
| Fuel Type: | Diesel | Petrol (Gasoline) |
| Drag coefficient: | 0.29 | 0.30 |
| Fuel tank volume: | 70 l | 60 l |
| Emission standard: | Euro 6 | Euro 6 |
| CO2 emissions: | 144-153 g/km | 165-172 g/km |
| Power: | 313 hp | 326 hp |
| Max power in: | 4400 rpm. | 5500 rpm. |
| Maximum speed: | 250 km/h | 250 km/h |
| Acceleration from 0 to 100 km/h: | 5.5 sec | 5.0 sec |
| Torque: | 630 Nm @ 1500-2500 rpm. | 450 Nm @ 1380-5000 rpm. |
| Model Engine: | N57D30 | B58B30 |
| Engine position: | Front, longitudinal | Front, longitudinal |
| Engine displacement: | 2993 cm3 | 2998 cm3 |
| Engine oil capacity: | 6.5 l | 6.5 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 | 6 |
| Number of valves per cylinder: | 4 | 4 |
| Compression ratio: | 16.5 | 11 |
| Piston Stroke: | 90 mm | 94.6 mm |
| Cylinder Bore: | 84 mm | 82 mm |
| Wheel Drive: | Rear wheel drive | All wheel drive (4x4) |
| Number of Gears (automatic transmission): | 8 Steptronic | 8 Steptronic |
| Length: | 4894 mm | 4640 mm |
| Width: | 1894 mm | 1825 mm |
| Height: | 1365 mm | 1404 mm |
| Wheelbase: | 2855 mm | 2810 mm |
| Front track: | 1600 mm | 1543 mm |
| Rear (Back) track: | 1665 mm | 1592 mm |
| Ride height(clearance): | 123 mm | 145 mm |
| Minimum volume of Luggage (trunk): | 300 l | 480 l |
| Maximum amount of Luggage (trunk): | 350 l | 1300 l |
| Front suspension: | Double wishbone | Independent, spring |
| Rear suspension: | Multi-link independent | Multi-link independent |
| Max weight: | 2365 kg | 2245 kg |
| Front brakes: | Disc | Ventilated discs |
| Rear brakes: | Disc | Ventilated discs |
| Kerb Weight: | 1860 kg | 1685 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 | 11.8 m |
| Permitted trailer load with brakes (12%): | 1800 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; 245/35 R20; 275/30 R20 | 225/50 R17; 225/45 R18; 255/40 R18; 225/40 R19; 255/35 R19 |
| 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 | 7.5J x 17; 8J x 18; 8.5J x 18; 8J x 19; 8.5J x 19 |