2005 Audi A4 vs. 2009 Audi RS4
To start off, 2009 Audi RS4 is newer by 4 year(s). Which means there will be less support and parts availability for 2005 Audi A4. In addition, the cost of maintenance, including insurance, on 2005 Audi A4 would be higher. At 4,161 cc (8 cylinders), 2009 Audi RS4 is equipped with a bigger engine. In terms of performance, 2009 Audi RS4 (414 HP @ 7800 RPM) has 253 more horse power than 2005 Audi A4. (161 HP @ 5700 RPM) In normal driving conditions, 2009 Audi RS4 should accelerate faster than 2005 Audi A4. With that said, vehicle weight also plays an important factor in acceleration. 2009 Audi RS4 weights approximately 170 kg more than 2005 Audi A4. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 2009 Audi RS4 is four wheel drive (4WD), it will have significant more traction and grip than 2005 Audi A4. In wet, icy, snow, or gravel driving conditions, 2009 Audi RS4 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, 2009 Audi RS4 (430 Nm @ 5500 RPM) has 199 more torque (in Nm) than 2005 Audi A4. (231 Nm @ 1950 RPM). This means 2009 Audi RS4 will have an easier job in driving up hills or pulling heavy equipment than 2005 Audi A4.
Compare all specifications:
| 2005 Audi A4 | 2009 Audi RS4 | |
| Make | Audi | Audi |
| Model | A4 | RS4 |
| Year Released | 2005 | 2009 |
| Body Type | Convertible | Sedan |
| Engine Position | Front | Front |
| Engine Size | 1779 cc | 4161 cc |
| Engine Cylinders | 4 cylinders | 8 cylinders |
| Engine Type | in-line | V |
| Valves per Cylinder | 5 valves | 4 valves |
| Horse Power | 161 HP | 414 HP |
| Engine RPM | 5700 RPM | 7800 RPM |
| Torque | 231 Nm | 430 Nm |
| Torque RPM | 1950 RPM | 5500 RPM |
| Engine Bore Size | 81 mm | 84.5 mm |
| Engine Stroke Size | 86.4 mm | 92.8 mm |
| Engine Compression Ratio | 9.0:1 | 12.5:1 |
| Fuel Type | Gasoline - Premium | Gasoline - Premium |
| Top Speed | 226 km/hour | 250 km/hour |
| Acceleration 0-100mph | 9.4 seconds | 4.8 seconds |
| Drive Type | Front | 4WD |
| Transmission Type | Manual | Manual |
| Number of Seats | 4 seats | 5 seats |
| Number of Doors | 2 doors | 5 doors |
| Vehicle Weight | 1540 kg | 1710 kg |
| Vehicle Length | 4580 mm | 4590 mm |
| Vehicle Width | 1780 mm | 1820 mm |
| Vehicle Height | 1400 mm | 1420 mm |
| Wheelbase Size | 2770 mm | 2660 mm |
| Fuel Consumption Overall | 8.5 L/100km | 13.5 L/100km |
| Fuel Tank Capacity | 70 L | 70 L |
