Comparison BMW 8 Series Convertible (G14) 840i (333 Hp) xDrive Steptronic & BMW X4 (G02 LCI, facelift 2021) M40d (340 Hp) MHEV xDrive Steptronic
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| Brand: | BMW | BMW |
| Model: | 8 Series | X4 |
| Generation: | 8 Series Convertible (G14) | X4 (G02 LCI, facelift 2021) |
| Engine / modification: | 840i (333 Hp) xDrive Steptronic | M40d (340 Hp) MHEV xDrive Steptronic |
| Production start: | 2020 year | 2021 year |
| Coupe type: | Cabriolet | |
| Num. of Doors: | 2 | 5 |
| Num. of seats: | 4 | 5 |
| Fuel Type: | Petrol (Gasoline) | Diesel |
| Drag coefficient: | 0.30 | 0.33-0.35 |
| Fuel tank volume: | 68 l | 68 l |
| Emission standard: | Euro 6d | Euro 6d |
| Power: | 333 hp | 340 hp |
| Max power in: | 5500-6250 rpm. | 4400 rpm. |
| Maximum speed: | 250 km/h | 250 , Electronically limited km/h |
| Acceleration from 0 to 100 km/h: | 5.2 sec | 4.9 sec |
| CO2 emissions (WLTP): | 171-190 g/km | |
| Torque: | 500 Nm @ 1700-4000 rpm. | 700 Nm @ 1750-2250 rpm. |
| Engine position: | Front, longitudinal | Front, longitudinal |
| Engine displacement: | 2998 cm3 | 2993 cm3 |
| Engine oil capacity: | 6.5 l | 7 l |
| Fuel System: | Direct injection | Diesel Commonrail |
| Position of cylinders: | Inline | Inline |
| Valvetrain: | VALVETRONIC | DOHC |
| Number of cylinders: | 6 | 6 |
| Number of valves per cylinder: | 4 | 4 |
| Compression ratio: | 11 | 16.5 |
| Piston Stroke: | 94.6 mm | 90 mm |
| Cylinder Bore: | 82 mm | 84 mm |
| Electric motor power: | 11 | |
| Wheel Drive: | All wheel drive (4x4) | All wheel drive (4x4) |
| Number of Gears (automatic transmission): | 8 Steptronic | 8 Steptronic |
| Length: | 4843 mm | 4752 mm |
| Width: | 1902 mm | 1938 mm |
| Height: | 1339 mm | 1621 mm |
| Wheelbase: | 2822 mm | 2864 mm |
| Front track: | 1627 mm | 1615 mm |
| Rear (Back) track: | 1642 mm | 1624 mm |
| Ride height(clearance): | 118 mm | 204 mm |
| Approach angle: | 25 ° | |
| Departure angle: | 22.2 ° | |
| Ramp angle: | 20 ° | |
| Wading depth: | 500 mm | |
| Minimum volume of Luggage (trunk): | 350 l | 525 l |
| Maximum amount of Luggage (trunk): | 1430 l | |
| Front suspension: | Double wishbone | |
| Rear suspension: | Multi-link independent | Independent multi-link |
| Max weight: | 2400 kg | 2560 kg |
| Front brakes: | Ventilated discs | Ventilated discs |
| Rear brakes: | Ventilated discs | Ventilated discs |
| Kerb Weight: | 1915 kg | 2020 kg |
| Steering type: | Steering rack and pinion | |
| Power steering: | Electric Steering | Electric Steering |
| Max. roof load: | 100 kg | |
| Minimum turning circle (turning diameter): | 11.6 m | 12.1 m |
| Permitted trailer load with brakes (12%): | 2400 kg | |
| Permitted trailer load without brakes: | 750 kg | |
| Permitted towbar download: | 100 kg | |
| Tire size: | Front wheel tires: 245/45 R18 100Y XL | Front wheel tires: 245/45 R20 |
| Wheel rims size: | Front wheel rims: 8J x 18 | Front wheel rims: 8J x 20 |