Comparison BMW 8 Series Convertible (G14) 840i (340 Hp) Steptronic & BMW 7 Series (E66, facelift 2005) 750Li (367 Hp) Steptronic
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| Brand: | BMW | BMW |
| Model: | 8 Series | 7 Series |
| Generation: | 8 Series Convertible (G14) | 7 Series (E66, facelift 2005) |
| Engine / modification: | 840i (340 Hp) Steptronic | 750Li (367 Hp) Steptronic |
| Production start: | 2019 year | 2005 year |
| Production end: | 2020 year | 2008 year |
| Coupe type: | Cabriolet | Sedan |
| Num. of Doors: | 2 | 4 |
| Num. of seats: | 4 | 5 |
| Fuel consumption / economy - urban: | 9.1-9.3 l/100 km | 16.9 l/100 km |
| Fuel consumption / economy - extra urban: | 6.4 l/100 km | 8.3 l/100 km |
| Fuel consumption / economy - combined: | 7.4-7.5 l/100 km | 11.4 l/100 km |
| Fuel Type: | Petrol (Gasoline) | Petrol (Gasoline) |
| Drag coefficient: | 0.30 | 0.29 |
| Fuel tank volume: | 68 l | 88 l |
| Emission standard: | Euro 6d - TEMP | EURO IV |
| CO2 emissions: | 168-170 g/km | |
| Power: | 340 hp | 367 hp |
| Max power in: | 5000-6500 rpm. | 6300 rpm. |
| Maximum speed: | 250 km/h | 250 km/h |
| Acceleration from 0 to 100 km/h: | 5.3 sec | 6.0 sec |
| Torque: | 500 Nm @ 1600-4500 rpm. | 490 Nm @ 3400 rpm. |
| Model Engine: | B58B30 | |
| Engine position: | Front, longitudinal | Front, longitudinal |
| Engine displacement: | 2998 cm3 | 4799 cm3 |
| Engine oil capacity: | 6.5 l | |
| Fuel System: | Direct injection | Multi-point injection |
| Aspiration / Turbine: | Twin-power turbo | |
| Position of cylinders: | Inline | V engine |
| Valvetrain: | DOHC | |
| Number of cylinders: | 6 | 8 |
| Number of valves per cylinder: | 4 | 4 |
| Compression ratio: | 11 | 10.5 |
| Piston Stroke: | 94.6 mm | 88.3 mm |
| Cylinder Bore: | 82 mm | 93 mm |
| Wheel Drive: | Rear wheel drive | Rear wheel drive |
| Number of Gears (automatic transmission): | 8 Steptronic | 6 Steptronic |
| Length: | 4843 mm | 5179 mm |
| Width: | 1902 mm | 1902 mm |
| Width including mirrors: | 2137 mm | |
| Height: | 1339 mm | 1484 mm |
| Wheelbase: | 2822 mm | 3130 mm |
| Front track: | 1627 mm | 1578 mm |
| Rear (Back) track: | 1642 mm | 1596 mm |
| Ride height(clearance): | 118 mm | |
| Front overhang: | 953 mm | |
| Rear overhang: | 1076 mm | |
| Minimum volume of Luggage (trunk): | 280 l | 500 l |
| Maximum amount of Luggage (trunk): | 350 l | |
| Front suspension: | Double wishbone | The depreciated rack |
| Rear suspension: | Multi-link independent | Helical spring |
| Max weight: | 2340 kg | 2530 kg |
| Front brakes: | Ventilated discs | Ventilated discs |
| Rear brakes: | Ventilated discs | Ventilated discs |
| Kerb Weight: | 1830 kg | 1950 kg |
| ABS: | yes | yes |
| Steering type: | Steering rack and pinion | Steering rack and pinion |
| Power steering: | Electric Steering | Hydraulic Steering |
| Permitted trailer load with brakes (8%): | 1305 kg | |
| Minimum turning circle (turning diameter): | 11.6 m | 12.6 m |
| Permitted trailer load with brakes (12%): | 1305 kg | |
| Tire size: | 245/45 R18 100Y XL; 275/40 R18 103Y XL | 245/55 R17 |
| Wheel rims size: | 8J x 18; 9J x 18 | R17 |