Comparison BMW 6 Series Gran Coupe (F06) 640i (320 Hp) xDrive Steptronic & Mercedes-Benz SL (W113) 250 SL (150 Hp)
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| Brand: | BMW | Mercedes-Benz |
| Model: | 6 Series | SL |
| Generation: | 6 Series Gran Coupe (F06) | SL (W113) |
| Engine / modification: | 640i (320 Hp) xDrive Steptronic | 250 SL (150 Hp) |
| Production start: | 2013 year | 1966 year |
| Production end: | 2015 year | 1968 year |
| Coupe type: | Coupe | Roadster |
| Num. of Doors: | 4 | 2 |
| Num. of seats: | 4 | 2 |
| Fuel consumption / economy - urban: | 11.1-11.3 l/100 km | |
| Fuel consumption / economy - extra urban: | 6.4-6.6 l/100 km | |
| Fuel consumption / economy - combined: | 8.1-8.3 l/100 km | 11.2 l/100 km |
| Fuel Type: | Petrol (Gasoline) | Petrol (Gasoline) |
| Drag coefficient: | 0.32 | |
| Fuel tank volume: | 70 l | 82 l |
| Emission standard: | Euro 5 | |
| CO2 emissions: | 189-193 g/km | |
| Power: | 320 hp | 150 hp |
| Max power in: | 5800-6000 rpm. | 5500 rpm. |
| Maximum speed: | 250 km/h | 200 km/h |
| Acceleration from 0 to 100 km/h: | 5.3 sec | 9.7 sec |
| Torque: | 450 Nm @ 1300-4500 rpm. | 216 Nm @ 4200 rpm. |
| Model Engine: | N55B30 | M 129.982 |
| Engine position: | Front, longitudinal | Front, longitudinal |
| Engine displacement: | 2979 cm3 | 2496 cm3 |
| Engine oil capacity: | 6.5 l | 5.5 l |
| Coolant: | 10.2 l | 12.9 l |
| Fuel System: | Direct injection | |
| Aspiration / Turbine: | Twin-power turbo | |
| Position of cylinders: | Inline | Inline |
| Valvetrain: | SOHC | |
| Number of cylinders: | 6 | 6 |
| Number of valves per cylinder: | 4 | 2 |
| Compression ratio: | 10.2 | 9.5 |
| Piston Stroke: | 89.6 mm | 78.8 mm |
| Cylinder Bore: | 84 mm | 82 mm |
| Wheel Drive: | All wheel drive (4x4) | Rear wheel drive |
| Number of Gears (automatic transmission): | 8 Steptronic | |
| Number of Gears (manual transmission): | 5 | |
| Length: | 5007 mm | 4285 mm |
| Width: | 1894 mm | 1760 mm |
| Height: | 1392 mm | 1320 mm |
| Wheelbase: | 2968 mm | 2400 mm |
| Front track: | 1600 mm | 1484 mm |
| Rear (Back) track: | 1665 mm | 1485 mm |
| Ride height(clearance): | 126 mm | 125 mm |
| Minimum volume of Luggage (trunk): | 460 l | 340 l |
| Maximum amount of Luggage (trunk): | 1265 l | |
| Front suspension: | Double wishbone | |
| Rear suspension: | Multi-link independent | Helical spring |
| Max weight: | 2430 kg | 1715 kg |
| Front brakes: | Ventilated discs | Disc |
| Rear brakes: | Ventilated discs | Disc |
| Kerb Weight: | 1825 kg | 1360 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): | 11.95 m | 10.4 m |
| Permitted trailer load with brakes (12%): | 1200 kg | |
| Permitted trailer load without brakes: | 715 kg | |
| Tire size: | 225/55 R17; 245/45 R18; 245/40 R19; 275/35 R19; 245/35 R20; 275/30 R20 | 185 HR 14 |
| Wheel rims size: | 8J x 17; 8J x 18; 8.5J x 19; 9J x 19; 8.5J x 20; 9J x 20 | 6 J x 14 HB |