1999 Audi S8 vs. 2005 Audi A8
To start off, 2005 Audi A8 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 5,998 cc, 2005 Audi A8 is equipped with a bigger engine. In terms of performance, 2005 Audi A8 (444 HP @ 6500 RPM) has 197 more horse power than 1999 Audi S8. (247 HP @ 7000 RPM) In normal driving conditions, 2005 Audi A8 should accelerate faster than 1999 Audi S8. With that said, vehicle weight also plays an important factor in acceleration. 1999 Audi S8 weights approximately 850 kg more than 2005 Audi A8.
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 Audi A8 (560 Nm @ 4000 RPM) has 230 more torque (in Nm) than 1999 Audi S8. (330 Nm @ 3400 RPM). This means 2005 Audi A8 will have an easier job in driving up hills or pulling heavy equipment than 1999 Audi S8.
Compare all specifications:
| 1999 Audi S8 | 2005 Audi A8 | |
| Make | Audi | Audi |
| Model | S8 | A8 |
| Year Released | 1999 | 2005 |
| Body Type | Sedan | Sedan |
| Engine Position | Front | Front |
| Engine Size | 4170 cc | 5998 cc |
| Engine Type | V | W |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 247 HP | 444 HP |
| Engine RPM | 7000 RPM | 6500 RPM |
| Torque | 330 Nm | 560 Nm |
| Torque RPM | 3400 RPM | 4000 RPM |
| Engine Compression Ratio | 11.0:1 | 11.0:1 |
| Top Speed | 250 km/hour | 245 km/hour |
| Acceleration 0-100mph | 6.6 seconds | 5.2 seconds |
| Drive Type | AWD | 4WD |
| Transmission Type | Automatic | Automatic |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 4 doors | 4 doors |
| Vehicle Weight | 1750 kg | 900 kg |
| Vehicle Length | 5040 mm | 5190 mm |
| Vehicle Width | 1890 mm | 1900 mm |
| Vehicle Height | 1420 mm | 1460 mm |
| Wheelbase Size | 2890 mm | 3080 mm |
| Fuel Consumption Overall | 13.9 L/100km | 13.8 L/100km |
| Fuel Tank Capacity | 90 L | 90 L |
