Comparison BMW 8 Series (E31) 830i 3.0 (218 Hp) & BMW 6 Series Coupe (F13 LCI, facelift 2015) 640d (313 Hp) Steptronic
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| Brand: | BMW | BMW |
| Model: | 8 Series | 6 Series |
| Generation: | 8 Series (E31) | 6 Series Coupe (F13 LCI, facelift 2015) |
| Engine / modification: | 830i 3.0 (218 Hp) | 640d (313 Hp) Steptronic |
| Production start: | 1992 year | 2015 year |
| Production end: | 1992 year | 2018 year |
| Coupe type: | Coupe | Coupe |
| Num. of Doors: | 2 | 2 |
| Num. of seats: | 4 | 4 |
| Fuel consumption / economy - urban: | 6.0-6.3 l/100 km | |
| Fuel consumption / economy - extra urban: | 4.8-5.1 l/100 km | |
| Fuel consumption / economy - combined: | 5.2-5.5 l/100 km | |
| Fuel Type: | Diesel | Diesel |
| Drag coefficient: | 0.28 | |
| Fuel tank volume: | 90 l | 70 l |
| Emission standard: | EURO VI | |
| CO2 emissions: | 139-147 g/km | |
| Power: | 218 hp | 313 hp |
| Max power in: | 4000 rpm. | 4400 rpm. |
| Maximum speed: | 241 km/h | 250 km/h |
| Acceleration from 0 to 100 km/h: | 7.8 sec | 5.3 sec |
| Torque: | 500 Nm @ 2750 rpm. | 630 Nm @ 1500-2500 rpm. |
| Model Engine: | M60B30 | |
| Engine position: | Front, longitudinal | Front, longitudinal |
| Engine displacement: | 2993 cm3 | 2993 cm3 |
| Engine oil capacity: | 6.5 l | |
| Coolant: | 8.0 l | |
| Fuel System: | Diesel Commonrail | Diesel Commonrail |
| Aspiration / Turbine: | Turbocharger | Twin-power turbo |
| Position of cylinders: | Inline | Inline |
| Valvetrain: | DOHC | |
| Number of cylinders: | 6 | 6 |
| Number of valves per cylinder: | 4 | 4 |
| Compression ratio: | 18 | 16.5 |
| Piston Stroke: | 90 mm | 90 mm |
| Cylinder Bore: | 84 mm | 84 mm |
| Wheel Drive: | Rear wheel drive | Rear wheel drive |
| Number of Gears (automatic transmission): | - | 8 Steptronic |
| Number of Gears (manual transmission): | 6 | |
| Length: | 4780 mm | 4894 mm |
| Width: | 1855 mm | 1894 mm |
| Height: | 1340 mm | 1369 mm |
| Wheelbase: | 2685 mm | 2855 mm |
| Front track: | 1555 mm | 1600 mm |
| Rear (Back) track: | 1560 mm | 1665 mm |
| Ride height(clearance): | 124 mm | |
| Minimum volume of Luggage (trunk): | 320 l | 460 l |
| Front suspension: | Wishbone | Double wishbone |
| Rear suspension: | Helical spring | Multi-link independent |
| Max weight: | 2210 kg | 2255 kg |
| Front brakes: | Ventilated discs | Disc |
| Rear brakes: | Disc | Disc |
| Kerb Weight: | 1790 kg | 1740 kg |
| ABS: | yes | yes |
| Steering type: | Steering rack and pinion | |
| Power steering: | Hydraulic Steering | Electric Steering |
| Max. roof load: | 75 kg | |
| Minimum turning circle (turning diameter): | 11.7 m | |
| Tire size: | 235/50 R16 | 225/55 R17; 245/45 R18; 275/45 R18; 245/40 R19; 275/35 R19; 245/35 R20; 275/30 R20 |
| Wheel rims size: | R16 | 8J x 17; 8J x 18; 9J x 18; 8.5J x 19; 9J x 19; 8.5J x 20; 9J x 20 |