Comparison Porsche 911 (997, facelift 2008) Carrera 4S 3.8 (385 Hp) & Audi A8 Long (D3, 4E, facelift 2007) 6.0 W12 (450 Hp) quattro Tiptronic
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| Brand: | Porsche | Audi |
| Model: | 911 | A8 |
| Generation: | 911 (997, facelift 2008) | A8 Long (D3, 4E, facelift 2007) |
| Engine / modification: | Carrera 4S 3.8 (385 Hp) | 6.0 W12 (450 Hp) quattro Tiptronic |
| Production start: | 2008 year | 2007 year |
| Production end: | 2011 year | 2010 year |
| Coupe type: | Coupe | Sedan |
| Num. of Doors: | 2 | 4 |
| Num. of seats: | 4 | 5 |
| Fuel consumption / economy - urban: | 16.5 l/100 km | 20.1 l/100 km |
| Fuel consumption / economy - extra urban: | 7.9 l/100 km | 9.8 l/100 km |
| Fuel consumption / economy - combined: | 11 l/100 km | 13.6 l/100 km |
| Fuel Type: | Petrol (Gasoline) | Petrol (Gasoline) |
| Drag coefficient: | 0.30 | 0.28 |
| Fuel tank volume: | 64 l | 90 l |
| Emission standard: | Euro 5 | Euro 4 |
| Power: | 385 hp | 450 hp |
| Max power in: | 6500 rpm. | 6200 rpm. |
| Maximum speed: | 297 km/h | 250 km/h |
| Acceleration from 0 to 100 km/h: | 4.7 sec | 5.2 sec |
| Torque: | 420 Nm @ 4400 rpm. | 580 Nm @ 4000-4700 rpm. |
| Model Engine: | MA1.01 | BHT, BSB, BTE |
| Engine position: | Rear, longitudinal | Front, longitudinal |
| Engine displacement: | 3824 cm3 | 5998 cm3 |
| Engine oil capacity: | 7.5 l | 12.5 l |
| Coolant: | 29-32 l | 18.9 l |
| Fuel System: | Direct injection | Multi-point injection |
| Position of cylinders: | Boxer | W engine |
| Valvetrain: | DOHC | DOHC |
| Number of cylinders: | 6 | 12 |
| Number of valves per cylinder: | 4 | 4 |
| Compression ratio: | 12.5 | 10.75 |
| Piston Stroke: | 90.2 mm | |
| Cylinder Bore: | 84 mm | |
| Wheel Drive: | Rear wheel drive | All wheel drive (4x4) |
| Number of Gears (automatic transmission): | 7 | 6 Tiptronic |
| Number of Gears (manual transmission): | 6 | |
| Length: | 4435 mm | 5192 mm |
| Width: | 1808 mm | 1894 mm |
| Height: | 1300 mm | 1455 mm |
| Wheelbase: | 2350 mm | 3074 mm |
| Front track: | 1488 mm | 1619 mm |
| Rear (Back) track: | 1548 mm | 1605 mm |
| Minimum volume of Luggage (trunk): | 135 l | 500 l |
| Front suspension: | McPherson | Multi-link suspension |
| Rear suspension: | Multi-link independent | Independent on trapezoidal lever |
| Max weight: | 1890 kg | 2545 kg |
| Front brakes: | Ventilated discs | Ventilated discs |
| Rear brakes: | Ventilated discs | Ventilated discs |
| Kerb Weight: | 1510 kg | 1995 kg |
| ABS: | yes | yes |
| Steering type: | Steering rack and pinion | Steering rack and pinion |
| Power steering: | Hydraulic Steering | Hydraulic Steering |
| Minimum turning circle (turning diameter): | 10.9 m | 12.5 m |
| Tire size: | 235/35 R19ZR; 305/30 R19ZR | 255/40 R19 |
| Wheel rims size: | 8J x 19 11J x 19 | R19 |