1999 Audi S8 vs. 2005 Porsche 911
To start off, 2005 Porsche 911 is newer by 6 year(s). Which means there will be less support and parts availability for 1999 Audi S8. In addition, the cost of maintenance, including insurance, on 1999 Audi S8 would be higher. At 4,170 cc (8 cylinders), 1999 Audi S8 is equipped with a bigger engine. In terms of performance, 2005 Porsche 911 (321 HP @ 4250 RPM) has 74 more horse power than 1999 Audi S8. (247 HP @ 7000 RPM) In normal driving conditions, 2005 Porsche 911 should accelerate faster than 1999 Audi S8. With that said, vehicle weight also plays an important factor in acceleration. 1999 Audi S8 weights approximately 345 kg more than 2005 Porsche 911.
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 40 more torque (in Nm) than 1999 Audi S8. (330 Nm @ 3400 RPM). This means 2005 Porsche 911 will have an easier job in driving up hills or pulling heavy equipment than 1999 Audi S8.
Compare all specifications:
| 1999 Audi S8 | 2005 Porsche 911 | |
| Make | Audi | Porsche |
| Model | S8 | 911 |
| Year Released | 1999 | 2005 |
| Body Type | Sedan | Coupe |
| Engine Position | Front | Rear |
| Engine Size | 4170 cc | 3596 cc |
| Engine Cylinders | 8 cylinders | 6 cylinders |
| Engine Type | V | boxer |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 247 HP | 321 HP |
| Engine RPM | 7000 RPM | 4250 RPM |
| Torque | 330 Nm | 370 Nm |
| Torque RPM | 3400 RPM | 4250 RPM |
| Engine Bore Size | 84.5 mm | 96 mm |
| Engine Stroke Size | 93 mm | 82.8 mm |
| Engine Compression Ratio | 11.0:1 | 11.3:1 |
| Top Speed | 250 km/hour | 285 km/hour |
| Acceleration 0-100mph | 6.6 seconds | 5.3 seconds |
| Drive Type | AWD | 4WD |
| Transmission Type | Automatic | Automatic |
| Number of Doors | 4 doors | 2 doors |
| Vehicle Weight | 1750 kg | 1405 kg |
| Vehicle Length | 5040 mm | 4440 mm |
| Vehicle Width | 1890 mm | 1780 mm |
| Vehicle Height | 1420 mm | 1310 mm |
| Wheelbase Size | 2890 mm | 2360 mm |
| Fuel Consumption Overall | 13.9 L/100km | 11.2 L/100km |
| Fuel Tank Capacity | 90 L | 64 L |
