Comparison BMW X4 (G02) 25d (231 Hp) xDrive Steptronic & BMW 6 Series (E24, facelift 1987) 635 CSi (220 Hp) & BMW Z4 (G29 LCI, facelift 2022) 30i (258 Hp) sDrive Steptronic
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| Brand: | BMW | BMW | BMW |
| Model: | X4 | 6 Series | Z4 |
| Generation: | X4 (G02) | 6 Series (E24, facelift 1987) | Z4 (G29 LCI, facelift 2022) |
| Engine / modification: | 25d (231 Hp) xDrive Steptronic | 635 CSi (220 Hp) | 30i (258 Hp) sDrive Steptronic |
| Production start: | 2018 year | 1987 year | 2022 year |
| Production end: | 2019 year | 1989 year | |
| Coupe type: | SUV | Coupe | Roadster |
| Powertrain Architecture: | Internal Combustion engine | ||
| Num. of Doors: | 5 | 2 | 2 |
| Num. of seats: | 5 | 4 | 2 |
| Fuel consumption / economy - urban: | 6.2-6.3 l/100 km | 16.8 l/100 km | |
| Fuel consumption / economy - extra urban: | 5.1-5.3 l/100 km | 7.9 l/100 km | |
| Fuel consumption / economy - combined: | 5.5-5.7 l/100 km | 11.5 l/100 km | |
| Fuel Type: | Diesel | Petrol (Gasoline) | Petrol (Gasoline) |
| Drag coefficient: | 0.30 | 0.41 | 0.31 |
| Fuel tank volume: | 60 l | 70 l | 52 l |
| Combined fuel consumption (WLTP): | 7-7.4 l/100 km | ||
| Emission standard: | Euro 6 | Euro 6d | |
| CO2 emissions: | 145-149 g/km | ||
| Power: | 231 hp | 220 hp | 258 hp |
| Max power in: | 4400 rpm. | 5700 rpm. | 5000-6500 rpm. |
| Maximum speed: | 230 km/h | 230 km/h | 250 , Electronically limited km/h |
| Acceleration from 0 to 100 km/h: | 6.8 sec | 7.4 sec | 5.4 sec |
| CO2 emissions (WLTP): | 159-167 g/km | ||
| Torque: | 500 Nm @ 2000 rpm. | 315 Nm @ 4000 rpm. | 400 Nm @ 1550-4400 rpm. |
| Model Engine: | B47D20 | M30 | B48 |
| Engine position: | Front, longitudinal | Front, longitudinal | Front, longitudinal |
| Engine displacement: | 1995 cm3 | 3430 cm3 | 1998 cm3 |
| Engine oil capacity: | 5.0 l | 5.8 l | 5.25 l |
| Coolant: | 9.4 l | 12 l | |
| Fuel System: | Diesel Commonrail | Multi-point injection | Direct injection |
| Aspiration / Turbine: | Twin-power turbo | ||
| Position of cylinders: | Inline | Inline | Inline |
| Valvetrain: | VALVETRONIC, Double-VANOS | ||
| Number of cylinders: | 4 | 6 | 4 |
| Number of valves per cylinder: | 4 | 2 | 4 |
| Compression ratio: | 11 | 9.2 | 10.2 |
| Piston Stroke: | 90 mm | 86 mm | 94.6 mm |
| Cylinder Bore: | 84 mm | 92 mm | 82 mm |
| Wheel Drive: | All wheel drive (4x4) | Rear wheel drive | Rear wheel drive |
| Number of Gears (automatic transmission): | 8 Steptronic | ||
| Number of Gears (manual transmission): | 5 | ||
| Length: | 4752 mm | 4815 mm | 4324 mm |
| Width: | 1918 mm | 1725 mm | 1864 mm |
| Width including mirrors: | 2138 mm | ||
| Height: | 1621 mm | 1365 mm | 1304 mm |
| Wheelbase: | 2864 mm | 2625 mm | 2470 mm |
| Front track: | 1620 mm | 1435 mm | 1618 mm |
| Rear (Back) track: | 1666 mm | 1465 mm | 1613 mm |
| Ride height(clearance): | 204 mm | 117 mm | |
| Front overhang: | 861 mm | ||
| Rear overhang: | 1027 mm | ||
| Wading depth: | 500 mm | ||
| Minimum volume of Luggage (trunk): | 525 l | 413 l | 281 l |
| Maximum amount of Luggage (trunk): | 1430 l | ||
| Front suspension: | Double wishbone | Independent, Spring McPherson, with stabilizer | |
| Rear suspension: | Multi-link independent | Independent, spring | |
| Max weight: | 2420 kg | 1880 kg | 1760 kg |
| Front brakes: | Ventilated discs | Ventilated discs | Ventilated discs |
| Rear brakes: | Ventilated discs | Disc | Ventilated discs |
| Kerb Weight: | 1755 kg | 1460 kg | 1470 kg |
| ABS: | yes | ||
| Steering type: | Steering rack and pinion | Cone worm with recirculation balls | Steering rack and pinion |
| Power steering: | Electric Steering | Electric Steering | |
| Max. roof load: | 100 kg | ||
| Minimum turning circle (turning diameter): | 12.1 m | 11.7 m | 11 m |
| Permitted trailer load with brakes (12%): | 2000 kg | ||
| Permitted trailer load without brakes: | 750 kg | ||
| Permitted towbar download: | 100 kg | ||
| Tire size: | 225/60 R18 | 220/55 VR 390 | Front wheel tires: 225/45 R18 |
| Wheel rims size: | 7J x 18 | Front wheel rims: 8J x 18 |