Comparison Audi A8 (D3, 4E) 4.2i V8 40V (335 Hp) quattro Tiptronic & Audi TTS Roadster (8S) 2.0 TFSI (310 Hp) quattro S tronic
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| Brand: | Audi | Audi |
| Model: | A8 | TT |
| Generation: | A8 (D3, 4E) | TTS Roadster (8S) |
| Engine / modification: | 4.2i V8 40V (335 Hp) quattro Tiptronic | 2.0 TFSI (310 Hp) quattro S tronic |
| Production start: | 2002 year | 2014 year |
| Production end: | 2005 year | 2018 year |
| Coupe type: | Sedan | Roadster |
| Num. of Doors: | 4 | 2 |
| Num. of seats: | 5 | 2 |
| Fuel consumption / economy - urban: | 17.5-17.6 l/100 km | 8.4 l/100 km |
| Fuel consumption / economy - extra urban: | 8.7-8.8 l/100 km | 6.0 l/100 km |
| Fuel consumption / economy - combined: | 11.9-12.0 l/100 km | 6.9 l/100 km |
| Fuel Type: | Petrol (Gasoline) | Petrol (Gasoline) |
| Drag coefficient: | 0.27 | 0.31 |
| Fuel tank volume: | 90 l | 55 l |
| Emission standard: | Euro 4 | Euro 6 |
| CO2 emissions: | 286 -288 g/km | 159 g/km |
| Power: | 335 hp | 310 hp |
| Max power in: | 6500 rpm. | 5800-6200 rpm. |
| Maximum speed: | 250 km/h | 250 km/h |
| Acceleration from 0 to 100 km/h: | 6.3 sec | 4.9 sec |
| Torque: | 430 Nm @ 3500 rpm. | 380 Nm @ 1800-5700 rpm. |
| Model Engine: | BFM | CJXG |
| Engine position: | Front, longitudinal | Front, transverse |
| Engine displacement: | 4172 cm3 | 1984 cm3 |
| Engine oil capacity: | 7.5 l | 5.7 l |
| Coolant: | 11.5-12 l | |
| Fuel System: | Multi-point injection | Direct injection |
| Aspiration / Turbine: | Turbocharging | |
| Position of cylinders: | V engine | Inline |
| Valvetrain: | DOHC | DOHC |
| Number of cylinders: | 8 | 4 |
| Number of valves per cylinder: | 5 | 4 |
| Compression ratio: | 11 | 9.3 |
| Piston Stroke: | 93 mm | 92.8 mm |
| Cylinder Bore: | 84.5 mm | 82.5 mm |
| Wheel Drive: | All wheel drive (4x4) | All wheel drive (4x4) |
| Number of Gears (automatic transmission): | 6 Tiptronic | 6 S tronic |
| Length: | 5051 mm | 4191 mm |
| Width: | 1894 mm | 1832 mm |
| Width including mirrors: | 1966 mm | |
| Height: | 1444 mm | 1345 mm |
| Wheelbase: | 2944 mm | 2505 mm |
| Front track: | 1629 mm | 1574 mm |
| Rear (Back) track: | 1615 mm | 1553 mm |
| Front overhang: | 893 mm | |
| Rear overhang: | 793 mm | |
| Minimum volume of Luggage (trunk): | 500 l | 280 l |
| Front suspension: | Multi-link suspension | Independent, Spring McPherson, with stabilizer |
| Rear suspension: | Independent on trapezoidal lever | Independent, spring |
| Max weight: | 2380 kg | 1820 kg |
| Front brakes: | Ventilated discs | Ventilated discs |
| Rear brakes: | Ventilated discs | Ventilated discs |
| Kerb Weight: | 1780 kg | 1575 kg |
| ABS: | yes | yes |
| Steering type: | Steering rack and pinion | Steering rack and pinion |
| Power steering: | Hydraulic Steering | Electric Steering |
| Max. roof load: | 100 kg | |
| Permitted trailer load with brakes (8%): | 2300 kg | |
| Minimum turning circle (turning diameter): | 12.1 m | 11.0 m |
| Permitted trailer load with brakes (12%): | 2300 kg | |
| Permitted trailer load without brakes: | 750 kg | |
| Permitted towbar download: | 95 kg | |
| Tire size: | 235/55 R17 | 245/40 R18 |
| Wheel rims size: | 8J x 17 | 8.5J x 18 |