Comparison Audi A8 (D3, 4E, facelift 2007) 4.2 BiTDI V8 (326 Hp) quattro DPF Tiptronic & Audi A4 Avant (B9 8W, facelift 2020) 40 TDI (204 Hp) MHEV S tronic
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| Brand: | Audi | Audi |
| Model: | A8 | A4 |
| Generation: | A8 (D3, 4E, facelift 2007) | A4 Avant (B9 8W, facelift 2020) |
| Engine / modification: | 4.2 BiTDI V8 (326 Hp) quattro DPF Tiptronic | 40 TDI (204 Hp) MHEV S tronic |
| Production start: | 2007 year | 2020 year |
| Production end: | 2009 year | |
| Coupe type: | Sedan | |
| Num. of Doors: | 4 | 5 |
| Num. of seats: | 5 | 5 |
| Fuel consumption / economy - urban: | 13.3 l/100 km | |
| Fuel consumption / economy - extra urban: | 7.2 l/100 km | |
| Fuel consumption / economy - combined: | 9.4 l/100 km | |
| Fuel Type: | Diesel | Diesel |
| Drag coefficient: | 0.27 | 0.27 |
| Fuel tank volume: | 90 l | 40 l |
| AdBlue tank: | 12 l | |
| Combined fuel consumption (WLTP): | 5.2-6.0 l/100 km | |
| Emission standard: | Euro 4 | Euro 6d-ISC-FCM |
| CO2 emissions: | 249 g/km | |
| Power: | 326 hp | 204 hp |
| Max power in: | 3750 rpm. | 3800-4200 rpm. |
| Maximum speed: | 250 km/h | 210 km/h |
| Acceleration from 0 to 100 km/h: | 5.9 sec | 7.6 sec |
| CO2 emissions (WLTP): | 136-157 g/km | |
| Torque: | 650 Nm @ 1600-3500 rpm. | 400 Nm @ 1750-3250 rpm. |
| Model Engine: | BVN | |
| Engine position: | Front, longitudinal | Front, longitudinal |
| Engine displacement: | 4134 cm3 | 1968 cm3 |
| Engine oil capacity: | 10.0 l | 5.5 l |
| Coolant: | 14.9 l | 11.9 l |
| Fuel System: | Diesel Commonrail | Diesel Commonrail |
| Aspiration / Turbine: | BiTurbo | |
| Position of cylinders: | V engine | Inline |
| Valvetrain: | DOHC | |
| Number of cylinders: | 8 | 4 |
| Number of valves per cylinder: | 4 | 4 |
| Compression ratio: | 16.5 | 15.5 |
| Piston Stroke: | 95.5 mm | 95.5 mm |
| Cylinder Bore: | 83 mm | 81 mm |
| Wheel Drive: | All wheel drive (4x4) | Front wheel drive |
| Number of Gears (automatic transmission): | 6 Tiptronic | 7 S tronic |
| Length: | 5062 mm | 4762 mm |
| Width: | 1894 mm | 1847 mm |
| Width including mirrors: | 2022 mm | |
| Height: | 1444 mm | 1460 mm |
| Wheelbase: | 2944 mm | 2820 mm |
| Front track: | 1629 mm | 1572 mm |
| Rear (Back) track: | 1615 mm | 1555 mm |
| Front overhang: | 899 mm | |
| Rear overhang: | 1043 mm | |
| Minimum volume of Luggage (trunk): | 500 l | 495 l |
| Maximum amount of Luggage (trunk): | 1495 l | |
| Front suspension: | Multi-link suspension | Multi-link suspension |
| Rear suspension: | Independent on trapezoidal lever | Multi-link independent |
| Max weight: | 2545 kg | 2175 kg |
| Front brakes: | Ventilated discs | Ventilated discs |
| Rear brakes: | Ventilated discs | Disc |
| Kerb Weight: | 1945 kg | 1550 kg |
| ABS: | yes | |
| Steering type: | Steering rack and pinion | |
| Power steering: | Hydraulic Steering | Electric Steering |
| Max. roof load: | 100 kg | 90 kg |
| Permitted trailer load with brakes (8%): | 2300 kg | 1900 kg |
| Minimum turning circle (turning diameter): | 12.1 m | 11.6 m |
| Permitted trailer load with brakes (12%): | 2300 kg | 1700 kg |
| Permitted trailer load without brakes: | 750 kg | 750 kg |
| Permitted towbar download: | 95 kg | 80 kg |
| Tire size: | 235/55 R17 | 225/50 R17 |
| Wheel rims size: | 8J x 17 | 7.5 J x 17 |