2005 Audi A8 vs. 1999 Porsche 911
To start off, 2005 Audi A8 is newer by 6 year(s). Which means there will be less support and parts availability for 1999 Porsche 911. In addition, the cost of maintenance, including insurance, on 1999 Porsche 911 would be higher. At 4,170 cc (8 cylinders), 2005 Audi A8 is equipped with a bigger engine. In terms of performance, 1999 Porsche 911 (414 HP @ 6200 RPM) has 84 more horse power than 2005 Audi A8. (330 HP @ 6500 RPM) In normal driving conditions, 1999 Porsche 911 should accelerate faster than 2005 Audi A8. With that said, vehicle weight also plays an important factor in acceleration. 2005 Audi A8 weights approximately 270 kg more than 1999 Porsche 911.
Both vehicles are four wheel drive (4WD) - it offers better handling, traction, and control in all driving conditions compared with front wheel drive or rear wheel drive vehicles. 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, 1999 Porsche 911 (560 Nm @ 2700 RPM) has 130 more torque (in Nm) than 2005 Audi A8. (430 Nm @ 3500 RPM). This means 1999 Porsche 911 will have an easier job in driving up hills or pulling heavy equipment than 2005 Audi A8.
Compare all specifications:
| 2005 Audi A8 | 1999 Porsche 911 | |
| Make | Audi | Porsche |
| Model | A8 | 911 |
| Year Released | 2005 | 1999 |
| Body Type | Sedan | Coupe |
| Engine Position | Front | Rear |
| Engine Size | 4170 cc | 3600 cc |
| Engine Cylinders | 8 cylinders | 6 cylinders |
| Engine Type | V | boxer |
| Valves per Cylinder | 5 valves | 2 valves |
| Horse Power | 330 HP | 414 HP |
| Engine RPM | 6500 RPM | 6200 RPM |
| Torque | 430 Nm | 560 Nm |
| Torque RPM | 3500 RPM | 2700 RPM |
| Engine Bore Size | 84.5 mm | 100 mm |
| Engine Stroke Size | 93 mm | 76.4 mm |
| Engine Compression Ratio | 11.0:1 | 9.4:1 |
| Top Speed | 250 km/hour | 298 km/hour |
| Acceleration 0-100mph | 6.3 seconds | 4.9 seconds |
| Drive Type | 4WD | 4WD |
| Transmission Type | Automatic | Automatic |
| Number of Seats | 5 seats | 2 seats |
| Number of Doors | 4 doors | 2 doors |
| Vehicle Weight | 1855 kg | 1585 kg |
| Vehicle Length | 5060 mm | 4440 mm |
| Vehicle Width | 1900 mm | 1840 mm |
| Vehicle Height | 1450 mm | 1300 mm |
| Wheelbase Size | 2770 mm | 2360 mm |
| Fuel Tank Capacity | 90 L | 64 L |
