Comparison BMW X4 (F26) 35i (306 Hp) xDrive Steptronic & Alfa Romeo Spider (Premium) 2.2 JTS (185) & Mercedes-Benz W120 Sedan (facelift 1959) 180 Dc (48 Hp)
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| Brand: | BMW | Alfa Romeo | Mercedes-Benz |
| Model: | X4 | Spider | Ponton |
| Generation: | X4 (F26) | Spider (Premium) | W120 Sedan (facelift 1959) |
| Engine / modification: | 35i (306 Hp) xDrive Steptronic | 2.2 JTS (185) | 180 Dc (48 Hp) |
| Production start: | 2014 year | 2006 year | 1961 year |
| Production end: | 2018 year | 2010 year | 1962 year |
| Coupe type: | SUV | Cabriolet | Sedan |
| Num. of Doors: | 5 | 2 | 5 |
| Num. of seats: | 5 | 2+2 | 5 |
| Fuel consumption / economy - urban: | 10.7 l/100 km | 13 l/100 km | |
| Fuel consumption / economy - extra urban: | 6.9 l/100 km | 7.3 l/100 km | |
| Fuel consumption / economy - combined: | 8.3 l/100 km | 9.4 l/100 km | 7.1 l/100 km |
| Fuel Type: | Petrol (Gasoline) | Petrol (Gasoline) | Diesel |
| Drag coefficient: | 0.34 | ||
| Fuel tank volume: | 67 l | 70 l | 56 l |
| Emission standard: | Euro 6 | ||
| CO2 emissions: | 193 g/km | ||
| Power: | 306 hp | 185 hp | 48 hp |
| Max power in: | 5800-6400 rpm. | 6500 rpm. | 3800 rpm. |
| Maximum speed: | 247 km/h | 217 km/h | 110 km/h |
| Acceleration from 0 to 100 km/h: | 5.5 sec | 8.8 sec | 36 sec |
| Torque: | 400 Nm @ 1200-5000 rpm. | 230 Nm/4500 rpm. | 108 Nm @ 2000 rpm. |
| Model Engine: | N55B30 | OM 621 IV / 621.914 | |
| Engine position: | Front, longitudinal | Front, transverse | Front, longitudinal |
| Engine displacement: | 2979 cm3 | 2198 cm3 | 1988 cm3 |
| Engine oil capacity: | 6.5 l | ||
| Coolant: | 9.6 l | ||
| Fuel System: | Direct injection | Direct injection | Diesel - Standard diesel injection (SDI) |
| Aspiration / Turbine: | Twin-power turbo | ||
| Position of cylinders: | Inline | Inline | Inline |
| Valvetrain: | DOHC | SOHC | |
| Number of cylinders: | 6 | 4 | 4 |
| Number of valves per cylinder: | 4 | 4 | 2 |
| Compression ratio: | 10.2 | 11.3 | 21 |
| Piston Stroke: | 89.6 mm | 94.6 mm | 83.6 mm |
| Cylinder Bore: | 84 mm | 86 mm | 87 mm |
| Wheel Drive: | All wheel drive (4x4) | Front wheel drive | Rear wheel drive |
| Number of Gears (automatic transmission): | 8 Steptronic | ||
| Number of Gears (manual transmission): | 6 | 4 | |
| Length: | 4671 mm | 4393 mm | 4500 mm |
| Width: | 1881 mm | 1830 mm | 1740 mm |
| Height: | 1624 mm | 1318 mm | 1560 mm |
| Wheelbase: | 2810 mm | 2528 mm | 2650 mm |
| Front track: | 1616 mm | 1579 mm | 1440 mm |
| Rear (Back) track: | 1632 mm | 1559 mm | 1485 mm |
| Ride height(clearance): | 204 mm | ||
| Minimum volume of Luggage (trunk): | 500 l | 253 l | |
| Maximum amount of Luggage (trunk): | 1400 l | ||
| Front suspension: | Independent, spring | Helical spring | |
| Rear suspension: | Multi-link independent | Transverse stabilizer | |
| Max weight: | 2405 kg | 1660 kg | |
| Front brakes: | Ventilated discs | Ventilated discs | Drum |
| Rear brakes: | Ventilated discs | Disc | Drum |
| Kerb Weight: | 1815 kg | 1530 kg | 1210 kg |
| ABS: | yes | yes | |
| Steering type: | Steering rack and pinion | Steering rack and pinion | Cone worm with recirculation balls |
| Power steering: | Electric Steering | ||
| Max. roof load: | 100 kg | ||
| Minimum turning circle (turning diameter): | 11.9 m | 10.7 m | |
| Permitted trailer load with brakes (12%): | 2400 kg | ||
| Permitted trailer load without brakes: | 750 kg | ||
| Permitted towbar download: | 100 kg | ||
| Tire size: | 245/50 R18 100W | 215/55 R16 | |
| Wheel rims size: | 8.0J x 18 |