2008 Audi S8 vs. 2009 Audi S6
To start off, 2009 Audi S6 is newer by 1 year(s). Which means there will be less support and parts availability for 2008 Audi S8. In addition, the cost of maintenance, including insurance, on 2008 Audi S8 would be higher. Both 2008 Audi S8 and 2009 Audi S6 are equipped with a 5,204 cc engine. In terms of performance, 2008 Audi S8 (450 HP @ 7000 RPM) has 15 more horse power than 2009 Audi S6. (435 HP @ 6800 RPM). In normal driving conditions, 2008 Audi S8 should accelerate faster than 2009 Audi S6.
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, both vehicles can yield 540 Nm of torque. So under normal driving conditions, the ability to climb up hills and pull heavy equipment should be relatively similar for both vehicles.
Compare all specifications:
| 2008 Audi S8 | 2009 Audi S6 | |
| Make | Audi | Audi |
| Model | S8 | S6 |
| Year Released | 2008 | 2009 |
| Body Type | Sedan | Sedan |
| Engine Position | Front | Front |
| Engine Size | 5204 cc | 5204 cc |
| Engine Cylinders | 10 cylinders | 10 cylinders |
| Engine Type | V | V |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 450 HP | 435 HP |
| Engine RPM | 7000 RPM | 6800 RPM |
| Torque | 540 Nm | 540 Nm |
| Torque RPM | 3500 RPM | 3000 RPM |
| Engine Bore Size | 84.5 mm | 84.5 mm |
| Engine Stroke Size | 92.8 mm | 92.8 mm |
| Engine Compression Ratio | 12.5:1 | 12.5:1 |
| Fuel Type | Gasoline - Premium | Gasoline |
| Drive Type | AWD | 4WD |
| Transmission Type | Automatic | Automatic |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 4 doors | 4 doors |
| Vehicle Length | 5070 mm | 4920 mm |
| Vehicle Width | 1900 mm | 2020 mm |
| Vehicle Height | 1430 mm | 1450 mm |
| Wheelbase Size | 2950 mm | 2850 mm |
| Fuel Consumption Highway | 12.4 L/100km | 11.3 L/100km |
| Fuel Consumption City | 18.1 L/100km | 16.9 L/100km |
| Fuel Consumption Overall | 15.7 L/100km | 14.8 L/100km |
| Fuel Tank Capacity | 90 L | 80 L |
