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 4,565 cc (8 cylinders), 2009 Cadillac STS is equipped with a bigger engine. In terms of performance, 2005 Audi RS6 (444 HP @ 5700 RPM) has 123 more horse power than 2009 Cadillac STS. (321 HP @ 6400 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. 2009 Cadillac STS weights approximately 5 kg more than 2005 Audi RS6.
Both vehicles are four wheel drive (4WD) - it offers better handling, traction, and control in all driving conditions compared with front wheel drive or rear wheel drive vehicles. 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 (560 Nm @ 1950 RPM) has 133 more torque (in Nm) than 2009 Cadillac STS. (427 Nm @ 4400 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 | 4565 cc |
| Engine Cylinders | 8 cylinders | 8 cylinders |
| Engine Type | V | V |
| Valves per Cylinder | 5 valves | 4 valves |
| Horse Power | 444 HP | 321 HP |
| Engine RPM | 5700 RPM | 6400 RPM |
| Torque | 560 Nm | 427 Nm |
| Torque RPM | 1950 RPM | 4400 RPM |
| Acceleration 0-100mph | 4.9 seconds | 6.2 seconds |
| Drive Type | 4WD | 4WD |
| Transmission Type | Automatic | Automatic |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 5 doors | 4 doors |
| Vehicle Weight | 1815 kg | 1820 kg |
| Vehicle Length | 4860 mm | 4990 mm |
| Vehicle Width | 1860 mm | 1850 mm |
| Vehicle Height | 1460 mm | 1470 mm |
| Wheelbase Size | 2850 mm | 2960 mm |
| Fuel Consumption Highway | 10.4 L/100km | 9.1 L/100km |
| Fuel Consumption Overall | 14.6 L/100km | 16.8 L/100km |
| Fuel Tank Capacity | 82 L | 66 L |
