2008 Audi S8 vs. 2009 Cadillac STS
To start off, 2009 Cadillac STS 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. At 5,204 cc (10 cylinders), 2008 Audi S8 is equipped with a bigger engine. In terms of performance, 2008 Audi S8 (444 HP @ 7000 RPM) has 142 more horse power than 2009 Cadillac STS. (302 HP @ 6300 RPM). In normal driving conditions, 2008 Audi S8 should accelerate faster than 2009 Cadillac STS. With that said, vehicle weight also plays an important factor in acceleration. 2008 Audi S8 weights approximately 305 kg more than 2009 Cadillac STS. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 2008 Audi S8 is all wheel drive (AWD), it will have significant more traction and grip than 2009 Cadillac STS. In wet, icy, snow, or gravel driving conditions, 2008 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, 2008 Audi S8 (540 Nm @ 3500 RPM) has 171 more torque (in Nm) than 2009 Cadillac STS. (369 Nm @ 5200 RPM). This means 2008 Audi S8 will have an easier job in driving up hills or pulling heavy equipment than 2009 Cadillac STS.
Compare all specifications:
| 2008 Audi S8 | 2009 Cadillac STS | |
| Make | Audi | Cadillac |
| Model | S8 | STS |
| Year Released | 2008 | 2009 |
| Body Type | Sedan | Sedan |
| Engine Position | Front | Front |
| Engine Size | 5204 cc | 3599 cc |
| Engine Cylinders | 10 cylinders | 6 cylinders |
| Engine Type | V | V |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 444 HP | 302 HP |
| Engine RPM | 7000 RPM | 6300 RPM |
| Torque | 540 Nm | 369 Nm |
| Torque RPM | 3500 RPM | 5200 RPM |
| Engine Compression Ratio | 12.5:1 | 11.3:1 |
| Fuel Type | Gasoline | Gasoline |
| Drive Type | AWD | Rear |
| Transmission Type | Automatic | Automatic |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 4 doors | 4 doors |
| Vehicle Weight | 1940 kg | 1635 kg |
| Vehicle Width | 1900 mm | 1850 mm |
| Wheelbase Size | 2950 mm | 2960 mm |
| Fuel Consumption Overall | 13.4 L/100km | 11.8 L/100km |
| Fuel Tank Capacity | 90 L | 64 L |
