Comparison Audi S8 (D5, facelift 2021) 4.0 TFSI V8 (571 Hp) MHEV quattro tiptronic & Audi S4 Avant (B8) 3.0 TFSI V6 (333 Hp) quattro S tronic
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| Brand: | Audi | Audi |
| Model: | S8 | S4 |
| Generation: | S8 (D5, facelift 2021) | S4 Avant (B8) |
| Engine / modification: | 4.0 TFSI V8 (571 Hp) MHEV quattro tiptronic | 3.0 TFSI V6 (333 Hp) quattro S tronic |
| Production start: | 2021 year | 2008 year |
| Production end: | 2011 year | |
| Coupe type: | Sedan | Combi |
| Num. of Doors: | 4 | 5 |
| Num. of seats: | 5 | 5 |
| Fuel consumption / economy - urban: | 13.8 l/100 km | |
| Fuel consumption / economy - extra urban: | 7.3 l/100 km | |
| Fuel consumption / economy - combined: | 9.7 l/100 km | |
| Fuel consumption at Low speed (WLTP): | 20.5 l/100 km | |
| Fuel Type: | Petrol (Gasoline) | Petrol (Gasoline) |
| Fuel consumption at Medium speed (WLTP): | 12 l/100 km | |
| Fuel consumption at high speed (WLTP): | 9.5 l/100 km | |
| Drag coefficient: | 0.28 | 0.325 |
| Fuel tank volume: | 82 l | 64 l |
| Fuel consumption at very high speed (WLTP): | 9.5 l/100 km | |
| Combined fuel consumption (WLTP): | 11.5 l/100 km | |
| Emission standard: | Euro 6d-ISC-FCM | Euro 5 |
| CO2 emissions: | 224 g/km | |
| Power: | 571 hp | 333 hp |
| Max power in: | 6000 rpm. | 5500-7000 rpm. |
| Maximum speed: | 250 , Electronically limited km/h | 250 km/h |
| Acceleration from 0 to 100 km/h: | 3.8 sec | 5.4 sec |
| CO2 emissions (WLTP): | 261 g/km | |
| Torque: | 800 Nm @ 2050-4500 rpm. | 440 Nm @ 2900-5300 rpm. |
| Model Engine: | CWWB | CAKA, CCBA |
| Engine position: | Front, longitudinal | Front, longitudinal |
| Engine displacement: | 3996 cm3 | 2995 cm3 |
| Engine oil capacity: | 9.5 l | 8.1 l |
| Coolant: | 16.3 l | 11.1 l |
| Fuel System: | Direct injection | Direct injection |
| Aspiration / Turbine: | Mechanical supercharging (Compressor) | |
| Position of cylinders: | V engine | V engine |
| Valvetrain: | DOHC | DOHC |
| Number of cylinders: | 8 | 6 |
| Number of valves per cylinder: | 4 | 4 |
| Compression ratio: | 10.1 | 10.3 |
| Piston Stroke: | 86 mm | 89 mm |
| Cylinder Bore: | 86 mm | 84.5 mm |
| Wheel Drive: | All wheel drive (4x4) | All wheel drive (4x4) |
| Number of Gears (automatic transmission): | 8 tiptronic | 7 S tronic |
| Length: | 5190 mm | 4717 mm |
| Width: | 1945 mm | 1826 mm |
| Width including mirrors: | 2130 mm | |
| Height: | 1475 mm | 1415 mm |
| Wheelbase: | 2998 mm | 2811 mm |
| Front track: | 1629 mm | 1552 mm |
| Rear (Back) track: | 1614 mm | 1539 mm |
| Approach angle: | 11 ° | |
| Departure angle: | 14 ° | |
| Front overhang: | 1007 mm | |
| Rear overhang: | 1185 mm | |
| Minimum volume of Luggage (trunk): | 505 l | 490 l |
| Maximum amount of Luggage (trunk): | 1430 l | |
| Front suspension: | Multi-link suspension | |
| Rear suspension: | Independent on trapezoidal lever | |
| Max weight: | 2835 kg | 2305 kg |
| Front brakes: | Ventilated discs | Ventilated discs |
| Rear brakes: | Ventilated discs | Disc |
| Kerb Weight: | 2220 kg | 1735 kg |
| ABS: | yes | |
| Steering type: | Steering rack and pinion | |
| Power steering: | Electric Steering | Hydraulic Steering |
| Max. roof load: | 90 kg | 90 kg |
| Permitted trailer load with brakes (8%): | 2300 kg | 2100 kg |
| Minimum turning circle (turning diameter): | 11.4 m | 11.5 m |
| Permitted trailer load with brakes (12%): | 2300 kg | 1900 kg |
| Permitted trailer load without brakes: | 750 kg | 750 kg |
| Permitted towbar download: | 95 kg | 80 kg |
| Tire size: | 265/40 R20 | 245/40 R18 |
| Wheel rims size: | 9J x 20 | 8J x 18 |