2006 Audi RS4 vs. 2005 Audi S4
To start off, 2006 Audi RS4 is newer by 1 year(s). Which means there will be less support and parts availability for 2005 Audi S4. In addition, the cost of maintenance, including insurance, on 2005 Audi S4 would be higher. At 4,163 cc (8 cylinders), 2005 Audi S4 is equipped with a bigger engine. In terms of performance, 2006 Audi RS4 (414 HP @ 7800 RPM) has 75 more horse power than 2005 Audi S4. (339 HP @ 7000 RPM). In normal driving conditions, 2006 Audi RS4 should accelerate faster than 2005 Audi S4. With that said, vehicle weight also plays an important factor in acceleration. 2006 Audi RS4 weights approximately 35 kg more than 2005 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, both vehicles can yield 430 Nm of torque. So under normal driving conditions, the ability to climb up hills and pull heavy equipment should be relatively similar for both vehicles.
Compare all specifications:
| 2006 Audi RS4 | 2005 Audi S4 | |
| Make | Audi | Audi |
| Model | RS4 | S4 |
| Year Released | 2006 | 2005 |
| Body Type | Sedan | Sedan |
| Engine Position | Front | Front |
| Engine Size | 4162 cc | 4163 cc |
| Engine Cylinders | 8 cylinders | 8 cylinders |
| Engine Type | V | V |
| Valves per Cylinder | 4 valves | 5 valves |
| Horse Power | 414 HP | 339 HP |
| Engine RPM | 7800 RPM | 7000 RPM |
| Torque | 430 Nm | 430 Nm |
| Torque RPM | 5500 RPM | 3500 RPM |
| Engine Bore Size | 84.5 mm | 84.5 mm |
| Engine Stroke Size | 92.8 mm | 92.8 mm |
| Engine Compression Ratio | 12.5:1 | 11.0:1 |
| Fuel Type | Gasoline - Premium | Gasoline - Premium |
| Top Speed | 250 km/hour | 250 km/hour |
| Acceleration 0-100mph | 4.8 seconds | 5.9 seconds |
| Drive Type | 4WD | 4WD |
| Transmission Type | Manual | Manual |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 5 doors | 4 doors |
| Vehicle Weight | 1710 kg | 1675 kg |
| Vehicle Length | 4590 mm | 4580 mm |
| Vehicle Width | 1820 mm | 1790 mm |
| Vehicle Height | 1420 mm | 1420 mm |
| Wheelbase Size | 2660 mm | 2580 mm |
| Fuel Consumption Overall | 13.5 L/100km | 13.4 L/100km |
| Fuel Tank Capacity | 70 L | 66 L |
