Comparison BMW 6 Series Coupe (F13 LCI, facelift 2015) 650i (450 Hp) Steptronic & BMW 4 Series Gran Coupe (F36, facelift 2017) 440i (326 Hp) Steptronic
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| Brand: | BMW | BMW |
| Model: | 6 Series | 4 Series |
| Generation: | 6 Series Coupe (F13 LCI, facelift 2015) | 4 Series Gran Coupe (F36, facelift 2017) |
| Engine / modification: | 650i (450 Hp) Steptronic | 440i (326 Hp) Steptronic |
| Production start: | 2015 year | 2017 year |
| Production end: | 2018 year | |
| Coupe type: | Coupe | Coupe |
| Num. of Doors: | 2 | 4 |
| Num. of seats: | 4 | 5 |
| Fuel consumption / economy - urban: | 11.9-12.3 l/100 km | 8.8-9.1 l/100 km |
| Fuel consumption / economy - extra urban: | 6.6-6.8 l/100 km | 5.3-5.5 l/100 km |
| Fuel consumption / economy - combined: | 8.6-8.8 l/100 km | 6.6-6.8 l/100 km |
| Fuel Type: | Petrol (Gasoline) | Petrol (Gasoline) |
| Drag coefficient: | 0.30 | 0.29 |
| Fuel tank volume: | 70 l | 60 l |
| Emission standard: | EURO VI | Euro 6 |
| CO2 emissions: | 199-206 g/km | 154-159 g/km |
| Power: | 450 hp | 326 hp |
| Max power in: | 5500-6000 rpm. | 5500 rpm. |
| Maximum speed: | 250 km/h | 250 km/h |
| Acceleration from 0 to 100 km/h: | 4.6 sec | 5.1 sec |
| Torque: | 650 Nm @ 2000-4500 rpm. | 450 Nm @ 1380-5000 rpm. |
| Model Engine: | B58B30 | |
| Engine position: | Front, longitudinal | Front, longitudinal |
| Engine displacement: | 4395 cm3 | 2998 cm3 |
| Engine oil capacity: | 9.0 l | 6.5 l |
| Coolant: | 14.4 l | |
| Fuel System: | Direct injection | Direct injection |
| Aspiration / Turbine: | Twin-power turbo | Twin-power turbo |
| Position of cylinders: | V engine | Inline |
| Number of cylinders: | 8 | 6 |
| Number of valves per cylinder: | 4 | 4 |
| Compression ratio: | 10 | 11 |
| Piston Stroke: | 88.3 mm | 94.6 mm |
| Cylinder Bore: | 89 mm | 82 mm |
| Wheel Drive: | Rear wheel drive | Rear wheel drive |
| Number of Gears (automatic transmission): | 8 Steptronic | 8 Steptronic |
| Length: | 4894 mm | 4640 mm |
| Width: | 1894 mm | 1825 mm |
| Height: | 1369 mm | 1389 mm |
| Wheelbase: | 2855 mm | 2810 mm |
| Front track: | 1600 mm | 1545 mm |
| Rear (Back) track: | 1665 mm | 1592 mm |
| Ride height(clearance): | 124 mm | 130 mm |
| Minimum volume of Luggage (trunk): | 460 l | 480 l |
| Maximum amount of Luggage (trunk): | 1300 l | |
| Front suspension: | Double wishbone | Independent, spring |
| Rear suspension: | Multi-link independent | Multi-link independent |
| Max weight: | 2310 kg | 2175 kg |
| Front brakes: | Disc | Ventilated discs |
| Rear brakes: | Disc | Ventilated discs |
| Kerb Weight: | 1795 kg | 1615 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 | 75 kg |
| Minimum turning circle (turning diameter): | 11.7 m | 11.3 m |
| Permitted trailer load with brakes (12%): | 1700 kg | |
| Permitted trailer load without brakes: | 750 kg | |
| Permitted towbar download: | 75 kg | |
| Tire size: | 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 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 |