2008 Audi A8 vs. 2005 Audi S8
To start off, 2008 Audi A8 is newer by 3 year(s). Which means there will be less support and parts availability for 2005 Audi S8. In addition, the cost of maintenance, including insurance, on 2005 Audi S8 would be higher. At 5,204 cc (10 cylinders), 2008 Audi A8 is equipped with a bigger engine. In terms of performance, 2008 Audi A8 (444 HP @ 7000 RPM) has 197 more horse power than 2005 Audi S8. (247 HP @ 4000 RPM). In normal driving conditions, 2008 Audi A8 should accelerate faster than 2005 Audi S8. With that said, vehicle weight also plays an important factor in acceleration. 2008 Audi A8 weights approximately 170 kg more than 2005 Audi S8. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
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, 2008 Audi A8 (541 Nm @ 3500 RPM) has 91 more torque (in Nm) than 2005 Audi S8. (450 Nm @ 3400 RPM). This means 2008 Audi A8 will have an easier job in driving up hills or pulling heavy equipment than 2005 Audi S8.
Compare all specifications:
| 2008 Audi A8 | 2005 Audi S8 | |
| Make | Audi | Audi |
| Model | A8 | S8 |
| Year Released | 2008 | 2005 |
| Body Type | Sedan | Sedan |
| Engine Position | Front | Front |
| Engine Size | 5204 cc | 4172 cc |
| Engine Cylinders | 10 cylinders | 8 cylinders |
| Engine Type | V | V |
| Valves per Cylinder | 4 valves | 5 valves |
| Horse Power | 444 HP | 247 HP |
| Engine RPM | 7000 RPM | 4000 RPM |
| Torque | 541 Nm | 450 Nm |
| Torque RPM | 3500 RPM | 3400 RPM |
| Drive Type | 4WD | AWD |
| Transmission Type | Automatic | Automatic |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 4 doors | 4 doors |
| Vehicle Weight | 1940 kg | 1770 kg |
| Wheelbase Size | 2950 mm | 2290 mm |
| Fuel Tank Capacity | 90 L | 90 L |
