2009 Audi RS6 vs. 2008 Audi A8
To start off, 2009 Audi RS6 is newer by 1 year(s). Which means there will be less support and parts availability for 2008 Audi A8. In addition, the cost of maintenance, including insurance, on 2008 Audi A8 would be higher. At 4,991 cc (10 cylinders), 2009 Audi RS6 is equipped with a bigger engine. In terms of performance, 2009 Audi RS6 (572 HP @ 6250 RPM) has 250 more horse power than 2008 Audi A8. (322 HP @ 3750 RPM). In normal driving conditions, 2009 Audi RS6 should accelerate faster than 2008 Audi A8. With that said, vehicle weight also plays an important factor in acceleration. 2009 Audi RS6 weights approximately 83 kg more than 2008 Audi A8. 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, both vehicles can yield 650 Nm of torque. So under normal driving conditions, the ability to climb up hills and pull heavy equipment should be relatively similar for both vehicles.
Compare all specifications:
| 2009 Audi RS6 | 2008 Audi A8 | |
| Make | Audi | Audi |
| Model | RS6 | A8 |
| Year Released | 2009 | 2008 |
| Body Type | Station Wagon | Sedan |
| Engine Position | Front | Front |
| Engine Size | 4991 cc | 4134 cc |
| Engine Cylinders | 10 cylinders | 8 cylinders |
| Engine Type | V | V |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 572 HP | 322 HP |
| Engine RPM | 6250 RPM | 3750 RPM |
| Torque | 650 Nm | 650 Nm |
| Torque RPM | 1500 RPM | 1600 RPM |
| Engine Compression Ratio | 10.5:1 | 16.5:1 |
| Fuel Type | Gasoline - Premium | Diesel |
| Top Speed | 280 km/hour | 245 km/hour |
| Acceleration 0-100mph | 4.6 seconds | 5.9 seconds |
| Drive Type | 4WD | 4WD |
| Transmission Type | Automatic | Automatic |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 5 doors | 4 doors |
| Vehicle Weight | 2028 kg | 1945 kg |
| Vehicle Length | 4930 mm | 5070 mm |
| Vehicle Width | 1900 mm | 1900 mm |
| Vehicle Height | 1470 mm | 1450 mm |
| Wheelbase Size | 2850 mm | 2950 mm |
| Fuel Consumption Overall | 14 L/100km | 9.4 L/100km |
| Fuel Tank Capacity | 80 L | 90 L |
