2004 Audi RS6 vs. 2005 Audi S4
To start off, 2005 Audi S4 is newer by 1 year(s). Which means there will be less support and parts availability for 2004 Audi RS6. In addition, the cost of maintenance, including insurance, on 2004 Audi RS6 would be higher. At 4,172 cc (8 cylinders), 2005 Audi S4 is equipped with a bigger engine. In terms of performance, 2004 Audi RS6 (445 HP @ 6300 RPM) has 105 more horse power than 2005 Audi S4. (340 HP @ 4000 RPM). In normal driving conditions, 2004 Audi RS6 should accelerate faster than 2005 Audi S4. With that said, vehicle weight also plays an important factor in acceleration. 2004 Audi RS6 weights approximately 55 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.
Let's talk about torque, 2004 Audi RS6 (560 Nm) has 150 more torque (in Nm) than 2005 Audi S4. (410 Nm). This means 2004 Audi RS6 will have an easier job in driving up hills or pulling heavy equipment than 2005 Audi S4.
Compare all specifications:
| 2004 Audi RS6 | 2005 Audi S4 | |
| Make | Audi | Audi |
| Model | RS6 | S4 |
| Year Released | 2004 | 2005 |
| Body Type | Sedan | 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 | 445 HP | 340 HP |
| Engine RPM | 6300 RPM | 4000 RPM |
| Torque | 560 Nm | 410 Nm |
| Engine Bore Size | 84.5 mm | 85 mm |
| Engine Stroke Size | 93 mm | 93 mm |
| Engine Compression Ratio | 9.0:1 | 11.0:1 |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 4 doors | 5 doors |
| Vehicle Weight | 1840 kg | 1785 kg |
| Vehicle Length | 4800 mm | 4550 mm |
| Vehicle Width | 1820 mm | 1770 mm |
| Vehicle Height | 1460 mm | 1430 mm |
| Wheelbase Size | 2760 mm | 2470 mm |
| Fuel Tank Capacity | 70 L | 66 L |
