2005 Audi A8 vs. 2008 Audi RS6
To start off, 2008 Audi RS6 is newer by 3 year(s). Which means there will be less support and parts availability for 2005 Audi A8. In addition, the cost of maintenance, including insurance, on 2005 Audi A8 would be higher. At 5,998 cc, 2005 Audi A8 is equipped with a bigger engine. In terms of performance, both vehicles can yield 444 horse power. So under normal driving conditions, the acceleration of both vehicles should be relatively similar. With that said, vehicle weight also plays an important factor in acceleration. 2005 Audi A8 weights approximately 40 kg more than 2008 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, 2005 Audi A8 (580 Nm @ 4000 RPM) has 20 more torque (in Nm) than 2008 Audi RS6. (560 Nm @ 1950 RPM). This means 2005 Audi A8 will have an easier job in driving up hills or pulling heavy equipment than 2008 Audi RS6.
Compare all specifications:
| 2005 Audi A8 | 2008 Audi RS6 | |
| Make | Audi | Audi |
| Model | A8 | RS6 |
| Year Released | 2005 | 2008 |
| Body Type | Sedan | Station Wagon |
| Engine Position | Front | Front |
| Engine Size | 5998 cc | 4172 cc |
| Engine Type | W | V |
| Valves per Cylinder | 4 valves | 5 valves |
| Horse Power | 444 HP | 444 HP |
| Engine RPM | 6200 RPM | 5700 RPM |
| Torque | 580 Nm | 560 Nm |
| Torque RPM | 4000 RPM | 1950 RPM |
| Engine Bore Size | 84 mm | 84.5 mm |
| Engine Stroke Size | 90.2 mm | 93 mm |
| Engine Compression Ratio | 11.0:1 | 9.0:1 |
| Fuel Type | Gasoline - Premium | Gasoline - Premium |
| Top Speed | 250 km/hour | 250 km/hour |
| Acceleration 0-100mph | 5.4 seconds | 4.7 seconds |
| Drive Type | 4WD | 4WD |
| Transmission Type | Automatic | Automatic |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 4 doors | 5 doors |
| Vehicle Weight | 1995 kg | 1955 kg |
| Vehicle Length | 5070 mm | 4840 mm |
| Vehicle Width | 1900 mm | 1860 mm |
| Vehicle Height | 1450 mm | 1400 mm |
| Wheelbase Size | 3080 mm | 2770 mm |
| Fuel Consumption Overall | 13.8 L/100km | 14.8 L/100km |
| Fuel Tank Capacity | 90 L | 82 L |
