Comparison Audi S4 (8E,B6) 4.2i V8 (344 Hp) quattro & BMW X4 (F26) 20d (190 Hp) xDrive Steptronic
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| Brand: | Audi | BMW |
| Model: | S4 | X4 |
| Generation: | S4 (8E,B6) | X4 (F26) |
| Engine / modification: | 4.2i V8 (344 Hp) quattro | 20d (190 Hp) xDrive Steptronic |
| Production start: | 2003 year | 2014 year |
| Production end: | 2004 year | 2018 year |
| Coupe type: | Sedan | SUV |
| Num. of Doors: | 4 | 5 |
| Num. of seats: | 5 | 5 |
| Fuel consumption / economy - urban: | 19.5 l/100 km | 5.7 l/100 km |
| Fuel consumption / economy - extra urban: | 9.8 l/100 km | 5.0 l/100 km |
| Fuel consumption / economy - combined: | 13.3 l/100 km | 5.2 l/100 km |
| Fuel Type: | Petrol (Gasoline) | Diesel |
| Drag coefficient: | 0.3 | 0.33 |
| Fuel tank volume: | 66 l | 67 l |
| Emission standard: | Euro 4 | Euro 6 |
| CO2 emissions: | 321 g/km | 138 g/km |
| Power: | 344 hp | 190 hp |
| Max power in: | 7000 rpm. | 4000 rpm. |
| Maximum speed: | 250 km/h | 212 km/h |
| Acceleration from 0 to 100 km/h: | 5.6 sec | 8.0 sec |
| Torque: | 410 Nm @ 3500 rpm. | 400 Nm @ 1750-2500 rpm. |
| Model Engine: | BBK | B47D20 |
| Engine position: | Front, longitudinal | Front, longitudinal |
| Engine displacement: | 4163 cm3 | 1995 cm3 |
| Engine oil capacity: | 9.0 l | 5 l |
| Coolant: | 12.2 l | 9.5 l |
| Fuel System: | Multi-point injection | Diesel Commonrail |
| Aspiration / Turbine: | Twin-power turbo | |
| Position of cylinders: | V engine | Inline |
| Valvetrain: | DOHC | |
| Number of cylinders: | 8 | 4 |
| Number of valves per cylinder: | 5 | 4 |
| Compression ratio: | 11 | 16.5 |
| Piston Stroke: | 92.8 mm | 90 mm |
| Cylinder Bore: | 84.5 mm | 84 mm |
| Wheel Drive: | All wheel drive (4x4) | All wheel drive (4x4) |
| Number of Gears (automatic transmission): | 6 | 8 Steptronic |
| Number of Gears (manual transmission): | 6 | |
| Length: | 4575 mm | 4671 mm |
| Width: | 1781 mm | 1881 mm |
| Height: | 1415 mm | 1624 mm |
| Wheelbase: | 2651 mm | 2810 mm |
| Front track: | 1516 mm | 1616 mm |
| Rear (Back) track: | 1512 mm | 1632 mm |
| Ride height(clearance): | 204 mm | |
| Minimum volume of Luggage (trunk): | 445 l | 500 l |
| Maximum amount of Luggage (trunk): | 720 l | 1400 l |
| Front suspension: | Independent multi-link | Independent, spring |
| Rear suspension: | Independent on trapezoidal lever | Multi-link independent |
| Max weight: | 2210 kg | 2335 kg |
| Front brakes: | Ventilated discs | Ventilated discs |
| Rear brakes: | Ventilated discs | Ventilated discs |
| Kerb Weight: | 1660 kg | 1745 kg |
| ABS: | yes | yes |
| Steering type: | Steering rack and pinion | Steering rack and pinion |
| Power steering: | Hydraulic Steering | Electric Steering |
| Max. roof load: | 75 kg | 100 kg |
| Minimum turning circle (turning diameter): | 11.5 m | 11.9 m |
| Permitted trailer load with brakes (12%): | 2400 kg | |
| Permitted trailer load without brakes: | 750 kg | |
| Permitted towbar download: | 100 kg | |
| Tire size: | 235/40 R18 | 225/60 R17 99V |
| Wheel rims size: | 8J x 18 | 7.5J x 17 |