2009 Audi S8 vs. 2009 Audi A8
To start off, both 2009 Audi S8 and 2009 Audi A8 were released in the same year (2009). Therefore the support and the availability on parts for both vehicles should be relatively similar. 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 221 more horse power than 2009 Audi A8. (229 HP @ 4000 RPM). In normal driving conditions, 2009 Audi S8 should accelerate faster than 2009 Audi A8. With that said, vehicle weight also plays an important factor in acceleration. 2009 Audi A8 weights approximately 655 kg more than 2009 Audi S8.
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 @ 3500 RPM) has 90 more torque (in Nm) than 2009 Audi A8. (450 Nm @ 1400 RPM). This means 2009 Audi S8 will have an easier job in driving up hills or pulling heavy equipment than 2009 Audi A8.
Compare all specifications:
| 2009 Audi S8 | 2009 Audi A8 | |
| Make | Audi | Audi |
| Model | S8 | A8 |
| Year Released | 2009 | 2009 |
| Body Type | Sedan | Sedan |
| Engine Position | Front | Front |
| Engine Size | 5204 cc | 2966 cc |
| Engine Cylinders | 10 cylinders | 6 cylinders |
| Engine Type | V | V |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 450 HP | 229 HP |
| Engine RPM | 7000 RPM | 4000 RPM |
| Torque | 540 Nm | 450 Nm |
| Torque RPM | 3500 RPM | 1400 RPM |
| Engine Compression Ratio | 12.5:1 | 17.0:1 |
| Fuel Type | Gasoline | Diesel |
| Acceleration 0-100mph | 5.1 seconds | 7.8 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 | 1175 kg | 1830 kg |
| Vehicle Height | 1430 mm | 1900 mm |
| Wheelbase Size | 2950 mm | 2950 mm |
| Fuel Consumption Overall | 15.8 L/100km | 8.4 L/100km |
| Fuel Tank Capacity | 90 L | 90 L |
