Comparison BMW 6 Series Coupe (F13) 640i (320 Hp) Steptronic & BMW 6 Series (E24, facelift 1982) M 635 CSi (286 Hp)
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| Brand: | BMW | BMW |
| Model: | 6 Series | 6 Series |
| Generation: | 6 Series Coupe (F13) | 6 Series (E24, facelift 1982) |
| Engine / modification: | 640i (320 Hp) Steptronic | M 635 CSi (286 Hp) |
| Production start: | 2011 year | 1984 year |
| Production end: | 2015 year | 1987 year |
| Coupe type: | Coupe | Coupe |
| Num. of Doors: | 2 | 2 |
| Num. of seats: | 4 | 4 |
| Fuel consumption / economy - urban: | 10.3-10.5 l/100 km | 16.5 l/100 km |
| Fuel consumption / economy - extra urban: | 6.0-6.2 l/100 km | 7.8 l/100 km |
| Fuel consumption / economy - combined: | 7.6-7.8 l/100 km | 11.3 l/100 km |
| Fuel Type: | Petrol (Gasoline) | Petrol (Gasoline) |
| Drag coefficient: | 0.30 | 0.39 |
| Fuel tank volume: | 70 l | 70 l |
| Emission standard: | Euro 5 | |
| CO2 emissions: | 177-181 g/km | |
| Power: | 320 hp | 286 hp |
| Max power in: | 5800-6000 rpm. | 6500 rpm. |
| Maximum speed: | 250 km/h | 255 km/h |
| Acceleration from 0 to 100 km/h: | 5.4 sec | 6.4 sec |
| Torque: | 450 Nm @ 1300-4500 rpm. | 340 Nm @ 4500 rpm. |
| Model Engine: | N55B30 | M88 |
| Engine position: | Front, longitudinal | Front, longitudinal |
| Engine displacement: | 2979 cm3 | 3453 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 | Inline |
| Number of cylinders: | 6 | 6 |
| Number of valves per cylinder: | 4 | 4 |
| Compression ratio: | 10.2 | 10.5 |
| Piston Stroke: | 89.6 mm | 84 mm |
| Cylinder Bore: | 84 mm | 93.4 mm |
| Wheel Drive: | Rear wheel drive | |
| Number of Gears (automatic transmission): | 8 Steptronic | |
| Number of Gears (manual transmission): | 5 | |
| Length: | 4894 mm | 4755 mm |
| Width: | 1894 mm | 1725 mm |
| Height: | 1396 mm | 1355 mm |
| Wheelbase: | 2855 mm | 2625 mm |
| Front track: | 1600 mm | 1430 mm |
| Rear (Back) track: | 1657 mm | 1464 mm |
| Ride height(clearance): | 124 mm | |
| Minimum volume of Luggage (trunk): | 460 l | 335 l |
| Front suspension: | Double wishbone | Independent, Spring McPherson, with stabilizer |
| Rear suspension: | Multi-link independent | Independent, spring |
| Max weight: | 2180 kg | 1850 kg |
| Front brakes: | Ventilated discs | Ventilated discs |
| Rear brakes: | Ventilated discs | Disc |
| Kerb Weight: | 1660 kg | 1500 kg |
| ABS: | yes | |
| Steering type: | Steering rack and pinion | Cone worm with recirculation balls |
| Power steering: | Electric Steering | |
| Max. roof load: | 75 kg | |
| Minimum turning circle (turning diameter): | 11.7 m | |
| Tire size: | 225/55 R17; 245/45 R18; 275/45 R18; 245/40 R19; 275/35 R19; 245/35 R20; 275/30 R20 | 195/70 R14 |
| 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 | 6.5J x 14 |