Comparison Audi S8 (D5, facelift 2021) 4.0 TFSI V8 (571 Hp) MHEV quattro tiptronic & Audi A4 Avant (B6 8E) 2.5 TDI V6 (155 Hp) Multitronic
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| Brand: | Audi | Audi |
| Model: | S8 | A4 |
| Generation: | S8 (D5, facelift 2021) | A4 Avant (B6 8E) |
| Engine / modification: | 4.0 TFSI V8 (571 Hp) MHEV quattro tiptronic | 2.5 TDI V6 (155 Hp) Multitronic |
| Production start: | 2021 year | 2001 year |
| Production end: | 2002 year | |
| Coupe type: | Sedan | Combi |
| Num. of Doors: | 4 | 5 |
| Num. of seats: | 5 | 5 |
| Fuel consumption / economy - urban: | 9.3 l/100 km | |
| Fuel consumption / economy - extra urban: | 5.7 l/100 km | |
| Fuel consumption / economy - combined: | 7 l/100 km | |
| Fuel consumption at Low speed (WLTP): | 20.5 l/100 km | |
| Fuel Type: | Petrol (Gasoline) | Diesel |
| 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 | 0.33 |
| Fuel tank volume: | 82 l | 70 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 | |
| Power: | 571 hp | 155 hp |
| Max power in: | 6000 rpm. | 4000 rpm. |
| Maximum speed: | 250 , Electronically limited km/h | 212 km/h |
| Acceleration from 0 to 100 km/h: | 3.8 sec | 9.7 sec |
| CO2 emissions (WLTP): | 261 g/km | |
| Torque: | 800 Nm @ 2050-4500 rpm. | 310 Nm @ 1400 rpm. |
| Model Engine: | CWWB | AYM |
| Engine position: | Front, longitudinal | Front, longitudinal |
| Engine displacement: | 3996 cm3 | 2496 cm3 |
| Engine oil capacity: | 9.5 l | 5.5 l |
| Coolant: | 16.3 l | 12 l |
| Fuel System: | Direct injection | Diesel Commonrail |
| Aspiration / Turbine: | Turbocharging | |
| 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 | 18.5 |
| Piston Stroke: | 86 mm | 86.4 mm |
| Cylinder Bore: | 86 mm | 78.3 mm |
| Wheel Drive: | All wheel drive (4x4) | Front wheel drive |
| Number of Gears (automatic transmission): | 8 tiptronic | Multitronic |
| Length: | 5190 mm | 4548 mm |
| Width: | 1945 mm | 1772 mm |
| Width including mirrors: | 2130 mm | |
| Height: | 1475 mm | 1428 mm |
| Wheelbase: | 2998 mm | 2650 mm |
| Front track: | 1629 mm | 1528 mm |
| Rear (Back) track: | 1614 mm | 1526 mm |
| Approach angle: | 11 ° | |
| Departure angle: | 14 ° | |
| Front overhang: | 1007 mm | |
| Rear overhang: | 1185 mm | |
| Minimum volume of Luggage (trunk): | 505 l | 442 l |
| Maximum amount of Luggage (trunk): | 1184 l | |
| Front suspension: | Independent multi-link | |
| Rear suspension: | Multi-link independent | |
| Max weight: | 2835 kg | 2140 kg |
| Front brakes: | Ventilated discs | Ventilated discs |
| Rear brakes: | Ventilated discs | Disc |
| Kerb Weight: | 2220 kg | 1590 kg |
| ABS: | yes | |
| Steering type: | Steering rack and pinion | |
| Power steering: | Electric Steering | Hydraulic Steering |
| Max. roof load: | 90 kg | |
| Permitted trailer load with brakes (8%): | 2300 kg | |
| Minimum turning circle (turning diameter): | 11.4 m | 11.1 m |
| Permitted trailer load with brakes (12%): | 2300 kg | |
| Permitted trailer load without brakes: | 750 kg | |
| Permitted towbar download: | 95 kg | |
| Tire size: | 265/40 R20 | 205/55 R16 |
| Wheel rims size: | 9J x 20 | 7J x 16 |