2005 Audi A4 vs. 2003 Audi RS6
To start off, 2005 Audi A4 is newer by 2 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. At 4,163 cc (8 cylinders), 2003 Audi RS6 is equipped with a bigger engine. In terms of performance, 2003 Audi RS6 (444 HP @ 6300 RPM) has 316 more horse power than 2005 Audi A4. (128 HP @ 4000 RPM) In normal driving conditions, 2003 Audi RS6 should accelerate faster than 2005 Audi A4. With that said, vehicle weight also plays an important factor in acceleration. 2003 Audi RS6 weights approximately 425 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.
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, 2003 Audi RS6 (560 Nm @ 1950 RPM) has 250 more torque (in Nm) than 2005 Audi A4. (310 Nm @ 1900 RPM). This means 2003 Audi RS6 will have an easier job in driving up hills or pulling heavy equipment than 2005 Audi A4.
Compare all specifications:
| 2005 Audi A4 | 2003 Audi RS6 | |
| Make | Audi | Audi |
| Model | A4 | RS6 |
| Year Released | 2005 | 2003 |
| Body Type | Sedan | Station Wagon |
| Engine Position | Front | Front |
| Engine Size | 1896 cc | 4163 cc |
| Engine Cylinders | 4 cylinders | 8 cylinders |
| Engine Type | in-line | V |
| Valves per Cylinder | 2 valves | 5 valves |
| Horse Power | 128 HP | 444 HP |
| Engine RPM | 4000 RPM | 6300 RPM |
| Torque | 310 Nm | 560 Nm |
| Torque RPM | 1900 RPM | 1950 RPM |
| Engine Bore Size | 79.5 mm | 84.5 mm |
| Engine Stroke Size | 95.5 mm | 93 mm |
| Engine Compression Ratio | 19.0:1 | 9.3:1 |
| Fuel Type | Diesel | Gasoline |
| Top Speed | 205 km/hour | 250 km/hour |
| Drive Type | 4WD | 4WD |
| Transmission Type | Manual | Manual |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 4 doors | 5 doors |
| Vehicle Weight | 1485 kg | 1910 kg |
| Vehicle Length | 4550 mm | 4860 mm |
| Vehicle Width | 1780 mm | 1860 mm |
| Vehicle Height | 1430 mm | 1460 mm |
| Wheelbase Size | 2580 mm | 2760 mm |
| Fuel Consumption Overall | 6.6 L/100km | 14.6 L/100km |
| Fuel Tank Capacity | 66 L | 82 L |
