2005 Audi RS6 vs. 2009 Cadillac STS
To start off, 2009 Cadillac STS is newer by 4 year(s). Which means there will be less support and parts availability for 2005 Audi RS6. In addition, the cost of maintenance, including insurance, on 2005 Audi RS6 would be higher. At 4,172 cc (8 cylinders), 2005 Audi RS6 is equipped with a bigger engine. In terms of performance, 2005 Audi RS6 (444 HP @ 5700 RPM) has 142 more horse power than 2009 Cadillac STS. (302 HP @ 6300 RPM). In normal driving conditions, 2005 Audi RS6 should accelerate faster than 2009 Cadillac STS. With that said, vehicle weight also plays an important factor in acceleration. 2005 Audi RS6 weights approximately 230 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 2005 Audi RS6 is four wheel drive (4WD), it will have significant more traction and grip than 2009 Cadillac STS. In wet, icy, snow, or gravel driving conditions, 2005 Audi RS6 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, 2005 Audi RS6 (580 Nm @ 1950 RPM) has 211 more torque (in Nm) than 2009 Cadillac STS. (369 Nm @ 5200 RPM). This means 2005 Audi RS6 will have an easier job in driving up hills or pulling heavy equipment than 2009 Cadillac STS.
Compare all specifications:
| 2005 Audi RS6 | 2009 Cadillac STS | |
| Make | Audi | Cadillac |
| Model | RS6 | STS |
| Year Released | 2005 | 2009 |
| Body Type | Station Wagon | Sedan |
| Engine Position | Front | Front |
| Engine Size | 4172 cc | 3599 cc |
| Engine Cylinders | 8 cylinders | 6 cylinders |
| Engine Type | V | V |
| Valves per Cylinder | 5 valves | 4 valves |
| Horse Power | 444 HP | 302 HP |
| Engine RPM | 5700 RPM | 6300 RPM |
| Torque | 580 Nm | 369 Nm |
| Torque RPM | 1950 RPM | 5200 RPM |
| Engine Compression Ratio | 9.0:1 | 11.3:1 |
| Fuel Type | Gasoline - Premium | Gasoline |
| Drive Type | 4WD | Rear |
| Transmission Type | Automatic | Automatic |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 5 doors | 4 doors |
| Vehicle Weight | 1865 kg | 1635 kg |
| Vehicle Length | 4840 mm | 5000 mm |
| Vehicle Width | 1860 mm | 1850 mm |
| Vehicle Height | 1400 mm | 1470 mm |
| Wheelbase Size | 2760 mm | 2960 mm |
| Fuel Consumption Overall | 14.6 L/100km | 11.8 L/100km |
| Fuel Tank Capacity | 82 L | 64 L |
