2006 Audi S4 vs. 2003 Audi RS6
To start off, 2006 Audi S4 is newer by 3 year(s). Which means there will be less support and parts availability for 2003 Audi RS6. In addition, the cost of maintenance, including insurance, on 2003 Audi RS6 would be higher. Both 2006 Audi S4 and 2003 Audi RS6 are equipped with a 4,163 cc engine. In terms of performance, 2003 Audi RS6 (444 HP @ 6300 RPM) has 104 more horse power than 2006 Audi S4. (340 HP @ 7000 RPM) In normal driving conditions, 2003 Audi RS6 should accelerate faster than 2006 Audi S4. With that said, vehicle weight also plays an important factor in acceleration. 2003 Audi RS6 weights approximately 30 kg more than 2006 Audi S4. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 2003 Audi RS6 is four wheel drive (4WD), it will have significant more traction and grip than 2006 Audi S4. In wet, icy, snow, or gravel driving conditions, 2003 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, 2003 Audi RS6 (560 Nm @ 1950 RPM) has 150 more torque (in Nm) than 2006 Audi S4. (410 Nm @ 3500 RPM). This means 2003 Audi RS6 will have an easier job in driving up hills or pulling heavy equipment than 2006 Audi S4.
Compare all specifications:
| 2006 Audi S4 | 2003 Audi RS6 | |
| Make | Audi | Audi |
| Model | S4 | RS6 |
| Year Released | 2006 | 2003 |
| Body Type | Sedan | Station Wagon |
| Engine Position | Front | Front |
| Engine Size | 4163 cc | 4163 cc |
| Engine Cylinders | 8 cylinders | 8 cylinders |
| Engine Type | V | V |
| Valves per Cylinder | 5 valves | 5 valves |
| Horse Power | 340 HP | 444 HP |
| Engine RPM | 7000 RPM | 6300 RPM |
| Torque | 410 Nm | 560 Nm |
| Torque RPM | 3500 RPM | 1950 RPM |
| Engine Bore Size | 84.5 mm | 84.5 mm |
| Engine Stroke Size | 92.8 mm | 93 mm |
| Engine Compression Ratio | 11.0:1 | 9.3:1 |
| Fuel Type | Gasoline | Gasoline |
| Drive Type | Front | 4WD |
| Transmission Type | Manual | Manual |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 4 doors | 5 doors |
| Vehicle Weight | 1880 kg | 1910 kg |
| Vehicle Length | 4590 mm | 4860 mm |
| Vehicle Width | 1780 mm | 1860 mm |
| Vehicle Height | 1430 mm | 1460 mm |
| Wheelbase Size | 2650 mm | 2760 mm |
| Fuel Consumption Overall | 12.3 L/100km | 14.6 L/100km |
| Fuel Tank Capacity | 63 L | 82 L |
