Comparison Audi S4 Avant (8E,B6) 4.2i V8 (344 Hp) quattro & Audi A8 (D4, 4H) 4.0 TFSI V8 (420 Hp) quattro Tiptronic & Audi RS 7 Sportback (C8) 4.0 TFSI V8 (600 Hp) quattro tiptronic MHEV
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| Brand: | Audi | Audi | Audi |
| Model: | S4 | A8 | RS 7 |
| Generation: | S4 Avant (8E,B6) | A8 (D4, 4H) | RS 7 Sportback (C8) |
| Engine / modification: | 4.2i V8 (344 Hp) quattro | 4.0 TFSI V8 (420 Hp) quattro Tiptronic | 4.0 TFSI V8 (600 Hp) quattro tiptronic MHEV |
| Production start: | 2003 year | 2012 year | 2019 year |
| Production end: | 2004 year | 2013 year | |
| Coupe type: | Combi | Sedan | |
| Num. of Doors: | 5 | 4 | 4 |
| Num. of seats: | 5 | 5 | 5 |
| Fuel consumption / economy - urban: | 19.6 l/100 km | 13.0 l/100 km | 16.1 l/100 km |
| Fuel consumption / economy - extra urban: | 9.8 l/100 km | 7.3 l/100 km | 8.7 l/100 km |
| Fuel consumption / economy - combined: | 13.4 l/100 km | 9.4 l/100 km | 11.4-11.6 l/100 km |
| Fuel Type: | Petrol (Gasoline) | Petrol (Gasoline) | Petrol (Gasoline) |
| Drag coefficient: | 0.31 | 0.27 | |
| Fuel tank volume: | 66 l | 90 l | 73 l |
| Combined fuel consumption (WLTP): | 12.2-12.7 l/100 km | ||
| Emission standard: | Euro 5 | Euro 6d-TEMP-EVAP-ISC | |
| CO2 emissions: | 322 g/km | 219 g/km | 261-265 g/km |
| Power: | 344 hp | 420 hp | 600 hp |
| Max power in: | 7000 rpm. | 5000 rpm. | 6000-6250 rpm. |
| Maximum speed: | 250 km/h | 250 km/h | 250 km/h |
| Acceleration from 0 to 100 km/h: | 5.8 sec | 4.6 sec | 3.6 sec |
| CO2 emissions (WLTP): | 277-289 g/km | ||
| Torque: | 410 Nm @ 3500 rpm. | 600 Nm @ 1500-4500 rpm. | 800 Nm @ 2050-4500 rpm. |
| Model Engine: | BBK | CEUA | |
| Engine position: | Front, longitudinal | Front, longitudinal | Front, longitudinal |
| Engine displacement: | 4163 cm3 | 3993 cm3 | 3996 cm3 |
| Engine oil capacity: | 9.0 l | 8.7 l | |
| Coolant: | 12.2 l | 15.0 l | |
| Fuel System: | Multi-point injection | Direct injection | Direct injection |
| Aspiration / Turbine: | BiTurbo | Twin-Turbo | |
| Position of cylinders: | V engine | V engine | V engine |
| Valvetrain: | DOHC | DOHC | |
| Number of cylinders: | 8 | 8 | 8 |
| Number of valves per cylinder: | 5 | 4 | 4 |
| Compression ratio: | 11 | 10.1 | |
| Piston Stroke: | 92.8 mm | 89 mm | |
| Cylinder Bore: | 84.5 mm | 84.5 mm | |
| Wheel Drive: | All wheel drive (4x4) | All wheel drive (4x4) | All wheel drive (4x4) |
| Number of Gears (automatic transmission): | 6 | 8 Tiptronic | 8 tiptronic |
| Number of Gears (manual transmission): | 6 | ||
| Length: | 4575 mm | 5137 mm | 5009 mm |
| Width: | 1781 mm | 1949 mm | 1950 mm |
| Width including mirrors: | 2111 mm | 2118 mm | |
| Height: | 1440 mm | 1460 mm | 1424 mm |
| Wheelbase: | 2651 mm | 2992 mm | 2930 mm |
| Front track: | 1516 mm | 1644 mm | 1668 mm |
| Rear (Back) track: | 1512 mm | 1635 mm | 1650 mm |
| Front overhang: | 1003 mm | 958 mm | |
| Rear overhang: | 1142 mm | 1121 mm | |
| Minimum volume of Luggage (trunk): | 442 l | 510 l | 535 l |
| Maximum amount of Luggage (trunk): | 1184 l | 906 l | 1390 l |
| Front suspension: | Independent multi-link | Multi-link suspension | Multi-link suspension |
| Rear suspension: | Independent on trapezoidal lever | Independent on trapezoidal lever | Multi-link independent |
| Max weight: | 2270 kg | 2545 kg | 2735 kg |
| Front brakes: | Ventilated discs | Ventilated discs | |
| Rear brakes: | Ventilated discs | Ventilated discs | |
| Kerb Weight: | 1720 kg | 1895 kg | 2065 kg |
| ABS: | yes | yes | yes |
| Steering type: | Steering rack and pinion | Steering rack and pinion | Steering rack and pinion |
| Power steering: | Hydraulic Steering | Electric Steering | Electric Steering |
| Max. roof load: | 75 kg | 100 kg | 90 kg |
| Permitted trailer load with brakes (8%): | 2300 kg | ||
| Minimum turning circle (turning diameter): | 11.5 m | 12.3 m | |
| Permitted trailer load with brakes (12%): | 2300 kg | 2100 kg | |
| Permitted trailer load without brakes: | 750 kg | 750 kg | |
| Permitted towbar download: | 95 kg | 95 kg | |
| Tire size: | 235/40 R18 | 235/60 R17 | 275/35 ZR21 103XL |
| Wheel rims size: | 8J x 18 | 8.0J x 17 | 10.5J x 21 |