2005 Audi A8 vs. 2009 Audi S8
To start off, 2009 Audi S8 is newer by 4 year(s). Which means there will be less support and parts availability for 2005 Audi A8. In addition, the cost of maintenance, including insurance, on 2005 Audi A8 would be higher. At 5,204 cc (10 cylinders), 2009 Audi S8 is equipped with a bigger engine. In terms of performance, 2009 Audi S8 (450 HP @ 7000 RPM) has 115 more horse power than 2005 Audi A8. (335 HP @ 4000 RPM) In normal driving conditions, 2009 Audi S8 should accelerate faster than 2005 Audi A8. With that said, vehicle weight also plays an important factor in acceleration. 2005 Audi A8 weights approximately 820 kg more than 2009 Audi S8.
Because 2009 Audi S8 is all wheel drive (AWD), it will have significant more traction and grip than 2005 Audi A8. In wet, icy, snow, or gravel driving conditions, 2009 Audi S8 will offer significantly more control. 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, 2009 Audi S8 (540 Nm) has 109 more torque (in Nm) than 2005 Audi A8. (431 Nm). This means 2009 Audi S8 will have an easier job in driving up hills or pulling heavy equipment than 2005 Audi A8.
Compare all specifications:
| 2005 Audi A8 | 2009 Audi S8 | |
| Make | Audi | Audi |
| Model | A8 | S8 |
| Year Released | 2005 | 2009 |
| Body Type | Sedan | Sedan |
| Engine Position | Front | Front |
| Engine Size | 4163 cc | 5204 cc |
| Engine Cylinders | 8 cylinders | 10 cylinders |
| Engine Type | V | V |
| Valves per Cylinder | 5 valves | 4 valves |
| Horse Power | 335 HP | 450 HP |
| Engine RPM | 4000 RPM | 7000 RPM |
| Torque | 431 Nm | 540 Nm |
| Drive Type | Front | AWD |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 4 doors | 4 doors |
| Vehicle Weight | 1995 kg | 1175 kg |
| Vehicle Length | 5190 mm | 5070 mm |
| Vehicle Width | 1900 mm | 1900 mm |
| Vehicle Height | 1460 mm | 1430 mm |
| Wheelbase Size | 3080 mm | 2950 mm |
| Fuel Consumption | 9.8 L/100km | 12.4 L/100km |
| Fuel Consumption City | 13.1 L/100km | 18.2 L/100km |
| Fuel Consumption Overall | 11.8 L/100km | 15.8 L/100km |
| Fuel Tank Capacity | 90 L | 90 L |
