2006 Audi S4 vs. 2005 Audi RS6
To start off, 2006 Audi S4 is newer by 1 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 104 more horse power than 2006 Audi S4. (340 HP @ 6800 RPM) In normal driving conditions, 2005 Audi RS6 should accelerate faster than 2006 Audi S4. With that said, vehicle weight also plays an important factor in acceleration. 2005 Audi RS6 weights approximately 587 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 2005 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, 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 170 more torque (in Nm) than 2006 Audi S4. (410 Nm @ 3500 RPM). This means 2005 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 | 2005 Audi RS6 | |
| Make | Audi | Audi |
| Model | S4 | RS6 |
| Year Released | 2006 | 2005 |
| Body Type | Station Wagon | Station Wagon |
| Engine Position | Front | Front |
| Engine Size | 4163 cc | 4172 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 | 6800 RPM | 5700 RPM |
| Torque | 410 Nm | 580 Nm |
| Torque RPM | 3500 RPM | 1950 RPM |
| Drive Type | Front | 4WD |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 5 doors | 5 doors |
| Vehicle Weight | 1278 kg | 1865 kg |
| Vehicle Length | 4590 mm | 4840 mm |
| Vehicle Width | 1790 mm | 1860 mm |
| Vehicle Height | 1420 mm | 1400 mm |
| Wheelbase Size | 2660 mm | 2760 mm |
| Fuel Consumption Overall | 13.1 L/100km | 14.6 L/100km |
| Fuel Tank Capacity | 63 L | 82 L |
