Comparison Audi A8 (D2,4D) 2.5 TDI V6 (180 Hp) quattro Tiptronic & Alfa Romeo 155 (167) 2.0 Turbo 16V (190 Hp) Q4
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| Brand: | Audi | Alfa Romeo |
| Model: | A8 | 155 |
| Generation: | A8 (D2,4D) | 155 (167) |
| Engine / modification: | 2.5 TDI V6 (180 Hp) quattro Tiptronic | 2.0 Turbo 16V (190 Hp) Q4 |
| Production start: | 2000 year | 1992 year |
| Production end: | 2002 year | 1998 year |
| Coupe type: | Sedan | Sedan |
| Num. of Doors: | 4 | 4 |
| Num. of seats: | 5 | 5 |
| Fuel consumption / economy - urban: | 13 l/100 km | 12.3 l/100 km |
| Fuel consumption / economy - extra urban: | 6.5 l/100 km | 7.7 l/100 km |
| Fuel consumption / economy - combined: | 8.9 l/100 km | 9.8 l/100 km |
| Fuel Type: | Diesel | Petrol (Gasoline) |
| Drag coefficient: | 0.29 | |
| Fuel tank volume: | 90 l | 60 l |
| Emission standard: | Euro 3 | |
| CO2 emissions: | 240 g/km | |
| Power: | 180 hp | 190 hp |
| Max power in: | 4000 rpm. | 6000 rpm. |
| Maximum speed: | 224 km/h | 225 km/h |
| Acceleration from 0 to 100 km/h: | 9.9 sec | 7 sec |
| Torque: | 370 Nm @ 1500-2500 rpm. | 291 Nm @ 2500 rpm. |
| Model Engine: | AKE, BAU, BDH | |
| Engine position: | Front, longitudinal | Front, transverse |
| Engine displacement: | 2496 cm3 | 1995 cm3 |
| Engine oil capacity: | 5.9 l | 4.5-5.5 l |
| Coolant: | 10 l | 9.1 l |
| Fuel System: | Diesel - Standard diesel injection (SDI) | Multi-point injection |
| Aspiration / Turbine: | Turbo / Intercooler (Turbocharging / Intercooler) | Turbocharging |
| Position of cylinders: | V engine | Inline |
| Valvetrain: | DOHC | DOHC |
| Number of cylinders: | 6 | 4 |
| Number of valves per cylinder: | 4 | 4 |
| Compression ratio: | 18.5 | 8 |
| Piston Stroke: | 86.4 mm | 90 mm |
| Cylinder Bore: | 78.3 mm | 84 mm |
| Wheel Drive: | All wheel drive (4x4) | All wheel drive (4x4) |
| Number of Gears (automatic transmission): | 5 Tiptronic | - |
| Number of Gears (manual transmission): | 5 | |
| Length: | 5034 mm | 4443 mm |
| Width: | 1880 mm | 1700 mm |
| Height: | 1448 mm | 1440 mm |
| Wheelbase: | 2882 mm | 2540 mm |
| Front track: | 1599 mm | 1477 mm |
| Rear (Back) track: | 1591 mm | 1402 mm |
| Front overhang: | 960 mm | |
| Rear overhang: | 943 mm | |
| Minimum volume of Luggage (trunk): | 525 l | 410 l |
| Front suspension: | Multi-link suspension | Wishbone |
| Rear suspension: | Independent on trapezoidal lever | Trailing |
| Max weight: | 2335 kg | 1845 kg |
| Front brakes: | Ventilated discs | Ventilated discs |
| Rear brakes: | Ventilated discs | Disc |
| Kerb Weight: | 1735 kg | 1445 kg |
| ABS: | yes | yes |
| Steering type: | Steering rack and pinion | Steering rack and pinion |
| Power steering: | Hydraulic Steering | Hydraulic Steering |
| Max. roof load: | 100 kg | |
| Permitted trailer load with brakes (8%): | 2200 kg | |
| Minimum turning circle (turning diameter): | 12.3 m | |
| Permitted trailer load with brakes (12%): | 2200 kg | 1500 kg |
| Permitted trailer load without brakes: | 750 kg | |
| Permitted towbar download: | 95 kg | |
| Tire size: | 225/60 R16 | 205/50 R15 |
| Wheel rims size: | 7J x 16 | 6J x 15 |