2003 Audi A8 vs. 2005 Audi RS6
To start off, 2005 Audi RS6 is newer by 2 year(s). Which means there will be less support and parts availability for 2003 Audi A8. In addition, the cost of maintenance, including insurance, on 2003 Audi A8 would be higher. At 4,171 cc (8 cylinders), 2005 Audi RS6 is equipped with a bigger engine. In terms of performance, 2005 Audi RS6 (444 HP @ 5700 RPM) has 168 more horse power than 2003 Audi A8. (276 HP @ 3750 RPM) In normal driving conditions, 2005 Audi RS6 should accelerate faster than 2003 Audi A8. With that said, vehicle weight also plays an important factor in acceleration. 2003 Audi A8 weights approximately 55 kg more than 2005 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, 2003 Audi A8 (650 Nm @ 1800 RPM) has 90 more torque (in Nm) than 2005 Audi RS6. (560 Nm @ 1950 RPM). This means 2003 Audi A8 will have an easier job in driving up hills or pulling heavy equipment than 2005 Audi RS6.
Compare all specifications:
| 2003 Audi A8 | 2005 Audi RS6 | |
| Make | Audi | Audi |
| Model | A8 | RS6 |
| Year Released | 2003 | 2005 |
| Body Type | Sedan | Sedan |
| Engine Position | Front | Front |
| Engine Size | 3936 cc | 4171 cc |
| Engine Cylinders | 8 cylinders | 8 cylinders |
| Engine Type | V | V |
| Valves per Cylinder | 4 valves | 5 valves |
| Horse Power | 276 HP | 444 HP |
| Engine RPM | 3750 RPM | 5700 RPM |
| Torque | 650 Nm | 560 Nm |
| Torque RPM | 1800 RPM | 1950 RPM |
| Drive Type | 4WD | 4WD |
| Transmission Type | Automatic | Automatic |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 4 doors | 4 doors |
| Vehicle Weight | 1880 kg | 1825 kg |
| Vehicle Length | 5060 mm | 4800 mm |
| Vehicle Height | 1450 mm | 1460 mm |
| Wheelbase Size | 2770 mm | 2770 mm |
| Fuel Consumption Overall | 9.6 L/100km | 14.6 L/100km |
| Fuel Tank Capacity | 90 L | 82 L |
