Comparison BMW 6 Series Coupe (F13 LCI, facelift 2015) 640i (320 Hp) Steptronic & Infiniti Q70L (facelift 2015) 3.7 V6 (330 Hp) Automatic
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| Brand: | BMW | Infiniti |
| Model: | 6 Series | Q70 |
| Generation: | 6 Series Coupe (F13 LCI, facelift 2015) | Q70L (facelift 2015) |
| Engine / modification: | 640i (320 Hp) Steptronic | 3.7 V6 (330 Hp) Automatic |
| Production start: | 2015 year | 2015 year |
| Production end: | 2018 year | 2018 year |
| Coupe type: | Coupe | Sedan |
| Num. of Doors: | 2 | 4 |
| Num. of seats: | 4 | 5 |
| Fuel consumption / economy - urban: | 10.3-10.7 l/100 km | 13.1 l/100 km |
| Fuel consumption / economy - extra urban: | 5.7-6.0 l/100 km | 9.4 l/100 km |
| Fuel consumption / economy - combined: | 7.4-7.7 l/100 km | |
| Fuel Type: | Petrol (Gasoline) | Petrol (Gasoline) |
| Drag coefficient: | 0.29 | 0.27 |
| Fuel tank volume: | 70 l | 76 l |
| Emission standard: | Euro 6 | |
| CO2 emissions: | 172-180 g/km | |
| Power: | 320 hp | 330 hp |
| Max power in: | 5800-6000 rpm. | 7000 rpm. |
| Maximum speed: | 250 km/h | |
| Acceleration from 0 to 100 km/h: | 5.3 sec | |
| Torque: | 450 Nm @ 1300-4500 rpm. | 366 Nm @ 5200 rpm. |
| Model Engine: | N55B30 | |
| Engine position: | Front, longitudinal | Front, longitudinal |
| Engine displacement: | 2979 cm3 | 3696 cm3 |
| Engine oil capacity: | 6.5 l | |
| Coolant: | 10.2 l | |
| Fuel System: | Direct injection | Multi-point injection |
| Aspiration / Turbine: | Twin-power turbo | |
| Position of cylinders: | Inline | V engine |
| Valvetrain: | DOHC, VVEL | |
| Number of cylinders: | 6 | 6 |
| Number of valves per cylinder: | 4 | 4 |
| Compression ratio: | 10.2 | 11 |
| Piston Stroke: | 89.6 mm | 86 mm |
| Cylinder Bore: | 84 mm | 95.5 mm |
| Wheel Drive: | Rear wheel drive | Rear wheel drive |
| Number of Gears (automatic transmission): | 8 Steptronic | 7 ASC |
| Length: | 4894 mm | 5131 mm |
| Width: | 1894 mm | 1844 mm |
| Height: | 1369 mm | 1501 mm |
| Wheelbase: | 2855 mm | 3051 mm |
| Front track: | 1600 mm | 1575 mm |
| Rear (Back) track: | 1665 mm | 1570 mm |
| Ride height(clearance): | 124 mm | |
| Minimum volume of Luggage (trunk): | 460 l | 422 l |
| Front suspension: | Double wishbone | Double wishbone |
| Rear suspension: | Multi-link independent | Independent, spring multi-link with stabilizer |
| Max weight: | 2210 kg | |
| Front brakes: | Disc | Ventilated discs |
| Rear brakes: | Disc | Ventilated discs |
| Kerb Weight: | 1685 kg | 1798 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 | 11.2 m |
| Tire size: | 225/55 R17; 245/45 R18; 275/45 R18; 245/40 R19; 275/35 R19; 245/35 R20; 275/30 R20 | 245/50 R18 |
| 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 18 |