1999 Audi S8 vs. 2004 Porsche 911
To start off, 2004 Porsche 911 is newer by 5 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, 2004 Porsche 911 (317 HP @ 6000 RPM) has 70 more horse power than 1999 Audi S8. (247 HP @ 7000 RPM) In normal driving conditions, 2004 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 268 kg more than 2004 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, 2004 Porsche 911 (370 Nm) has 40 more torque (in Nm) than 1999 Audi S8. (330 Nm). This means 2004 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 | 2004 Porsche 911 | |
| Make | Audi | Porsche |
| Model | S8 | 911 |
| Year Released | 1999 | 2004 |
| Body Type | Sedan | Convertible |
| Engine Position | Front | Rear |
| Engine Size | 4170 cc | 3589 cc |
| Engine Cylinders | 8 cylinders | 6 cylinders |
| Engine Type | V | boxer |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 247 HP | 317 HP |
| Engine RPM | 7000 RPM | 6000 RPM |
| Torque | 330 Nm | 370 Nm |
| Engine Bore Size | 84.5 mm | 96 mm |
| Engine Stroke Size | 93 mm | 83 mm |
| Engine Compression Ratio | 11.0:1 | 11.3:1 |
| Drive Type | AWD | 4WD |
| Number of Seats | 5 seats | 4 seats |
| Number of Doors | 4 doors | 2 doors |
| Vehicle Weight | 1750 kg | 1482 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 Highway | 9.5 L/100km | 9.1 L/100km |
| Fuel Consumption City | 21.7 L/100km | 13.1 L/100km |
| Fuel Consumption Overall | 13.9 L/100km | 12.4 L/100km |
| Fuel Tank Capacity | 90 L | 64 L |
