2004 Audi RS6 vs. 2005 Audi A8
To start off, 2005 Audi A8 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 4,170 cc (8 cylinders), 2005 Audi A8 is equipped with a bigger engine. In terms of performance, 2004 Audi RS6 (445 HP @ 6300 RPM) has 115 more horse power than 2005 Audi A8. (330 HP @ 6500 RPM). In normal driving conditions, 2004 Audi RS6 should accelerate faster than 2005 Audi A8. With that said, vehicle weight also plays an important factor in acceleration. 2005 Audi A8 weights approximately 15 kg more than 2004 Audi RS6.
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, 2004 Audi RS6 (560 Nm @ 1950 RPM) has 130 more torque (in Nm) than 2005 Audi A8. (430 Nm @ 3500 RPM). This means 2004 Audi RS6 will have an easier job in driving up hills or pulling heavy equipment than 2005 Audi A8. 2005 Audi A8 has automatic transmission and 2004 Audi RS6 has manual transmission. 2004 Audi RS6 will offer better control over acceleration and deceleration in addition to better fuel efficiency overall. 2005 Audi A8 will be easier to drive especially in heavy traffic.
Compare all specifications:
| 2004 Audi RS6 | 2005 Audi A8 | |
| Make | Audi | Audi |
| Model | RS6 | A8 |
| Year Released | 2004 | 2005 |
| Body Type | Sedan | Sedan |
| Engine Position | Front | Front |
| Engine Size | 4163 cc | 4170 cc |
| Engine Cylinders | 8 cylinders | 8 cylinders |
| Engine Type | V | V |
| Valves per Cylinder | 5 valves | 5 valves |
| Horse Power | 445 HP | 330 HP |
| Engine RPM | 6300 RPM | 6500 RPM |
| Torque | 560 Nm | 430 Nm |
| Torque RPM | 1950 RPM | 3500 RPM |
| Engine Bore Size | 84.5 mm | 84.5 mm |
| Engine Stroke Size | 93 mm | 93 mm |
| Engine Compression Ratio | 9.0:1 | 11.0:1 |
| Fuel Type | Gasoline | Gasoline - Premium |
| Drive Type | 4WD | 4WD |
| Transmission Type | Manual | Automatic |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 4 doors | 4 doors |
| Vehicle Weight | 1840 kg | 1855 kg |
| Vehicle Length | 4800 mm | 5060 mm |
| Vehicle Width | 1820 mm | 1900 mm |
| Vehicle Height | 1460 mm | 1450 mm |
| Wheelbase Size | 2760 mm | 2770 mm |
| Fuel Tank Capacity | 70 L | 90 L |
