2005 Audi RS6 vs. 2008 Audi S4
To start off, 2008 Audi S4 is newer by 3 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 103 more horse power than 2008 Audi S4. (341 HP @ 7000 RPM). In normal driving conditions, 2005 Audi RS6 should accelerate faster than 2008 Audi S4. With that said, vehicle weight also plays an important factor in acceleration. 2005 Audi RS6 weights approximately 655 kg more than 2008 Audi S4. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
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 150 more torque (in Nm) than 2008 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 2008 Audi S4. 2005 Audi RS6 has automatic transmission and 2008 Audi S4 has manual transmission. 2008 Audi S4 will offer better control over acceleration and deceleration in addition to better fuel efficiency overall. 2005 Audi RS6 will be easier to drive especially in heavy traffic.
Compare all specifications:
| 2005 Audi RS6 | 2008 Audi S4 | |
| Make | Audi | Audi |
| Model | RS6 | S4 |
| Year Released | 2005 | 2008 |
| Body Type | Station Wagon | Sedan |
| Engine Position | Front | Front |
| Engine Size | 4172 cc | 4163 cc |
| Engine Cylinders | 8 cylinders | 8 cylinders |
| Engine Type | V | V |
| Valves per Cylinder | 5 valves | 5 valves |
| Horse Power | 444 HP | 341 HP |
| Engine RPM | 5700 RPM | 7000 RPM |
| Torque | 560 Nm | 410 Nm |
| Torque RPM | 1950 RPM | 3500 RPM |
| Drive Type | 4WD | 4WD |
| Transmission Type | Automatic | Manual |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 5 doors | 4 doors |
| Vehicle Weight | 1815 kg | 1160 kg |
| Vehicle Length | 4860 mm | 4590 mm |
| Vehicle Width | 1860 mm | 1790 mm |
| Vehicle Height | 1460 mm | 1420 mm |
| Wheelbase Size | 2850 mm | 2660 mm |
| Fuel Consumption | 10.4 L/100km | 11.8 L/100km |
| Fuel Consumption Overall | 14.6 L/100km | 15.7 L/100km |
| Fuel Tank Capacity | 82 L | 63 L |
