2009 Audi A8 vs. 2005 Porsche 911
To start off, 2009 Audi A8 is newer by 4 year(s). Which means there will be less support and parts availability for 2005 Porsche 911. In addition, the cost of maintenance, including insurance, on 2005 Porsche 911 would be higher. At 3,596 cc (6 cylinders), 2005 Porsche 911 is equipped with a bigger engine. In terms of performance, 2005 Porsche 911 (321 HP @ 4250 RPM) has 114 more horse power than 2009 Audi A8. (207 HP @ 5500 RPM) In normal driving conditions, 2005 Porsche 911 should accelerate faster than 2009 Audi A8. With that said, vehicle weight also plays an important factor in acceleration. 2009 Audi A8 weights approximately 285 kg more than 2005 Porsche 911.
Because 2005 Porsche 911 is four wheel drive (4WD), it will have significant more traction and grip than 2009 Audi A8. In wet, icy, snow, or gravel driving conditions, 2005 Porsche 911 will offer significantly more control. With that said, do keep in mind that many other factors such as speed and the wear on your tires can also have significant impact on traction and control. Let's talk about torque, 2005 Porsche 911 (370 Nm @ 4250 RPM) has 90 more torque (in Nm) than 2009 Audi A8. (280 Nm @ 3000 RPM). This means 2005 Porsche 911 will have an easier job in driving up hills or pulling heavy equipment than 2009 Audi A8.
Compare all specifications:
| 2009 Audi A8 | 2005 Porsche 911 | |
| Make | Audi | Porsche |
| Model | A8 | 911 |
| Year Released | 2009 | 2005 |
| Body Type | Sedan | Coupe |
| Engine Position | Front | Rear |
| Engine Size | 2772 cc | 3596 cc |
| Engine Cylinders | 6 cylinders | 6 cylinders |
| Engine Type | V | boxer |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 207 HP | 321 HP |
| Engine RPM | 5500 RPM | 4250 RPM |
| Torque | 280 Nm | 370 Nm |
| Torque RPM | 3000 RPM | 4250 RPM |
| Engine Bore Size | 84.5 mm | 96 mm |
| Engine Stroke Size | 82.4 mm | 82.8 mm |
| Engine Compression Ratio | 12.5:1 | 11.3:1 |
| Top Speed | 238 km/hour | 285 km/hour |
| Acceleration 0-100mph | 8 seconds | 5.3 seconds |
| Drive Type | Front | 4WD |
| Number of Doors | 4 doors | 2 doors |
| Vehicle Weight | 1690 kg | 1405 kg |
| Vehicle Length | 5070 mm | 4440 mm |
| Vehicle Width | 1900 mm | 1780 mm |
| Vehicle Height | 1450 mm | 1310 mm |
| Wheelbase Size | 2950 mm | 2360 mm |
| Fuel Consumption Overall | 8.3 L/100km | 11.2 L/100km |
| Fuel Tank Capacity | 90 L | 64 L |
