2005 Audi A8 vs. 2009 Audi R8
To start off, 2009 Audi R8 is newer by 4 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 4,163 cc (8 cylinders), 2009 Audi R8 is equipped with a bigger engine. In terms of performance, 2009 Audi R8 (420 HP @ 7800 RPM) has 149 more horse power than 2005 Audi A8. (271 HP @ 3750 RPM) In normal driving conditions, 2009 Audi R8 should accelerate faster than 2005 Audi A8. With that said, vehicle weight also plays an important factor in acceleration. 2005 Audi A8 weights approximately 875 kg more than 2009 Audi R8.
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 (650 Nm @ 1800 RPM) has 220 more torque (in Nm) than 2009 Audi R8. (430 Nm @ 4500 RPM). This means 2005 Audi A8 will have an easier job in driving up hills or pulling heavy equipment than 2009 Audi R8. 2005 Audi A8 has automatic transmission and 2009 Audi R8 has manual transmission. 2009 Audi R8 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:
| 2005 Audi A8 | 2009 Audi R8 | |
| Make | Audi | Audi |
| Model | A8 | R8 |
| Year Released | 2005 | 2009 |
| Body Type | Sedan | Coupe |
| Engine Position | Front | Middle |
| Engine Size | 3936 cc | 4163 cc |
| Engine Cylinders | 8 cylinders | 8 cylinders |
| Engine Type | V | V |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 271 HP | 420 HP |
| Engine RPM | 3750 RPM | 7800 RPM |
| Torque | 650 Nm | 430 Nm |
| Torque RPM | 1800 RPM | 4500 RPM |
| Engine Compression Ratio | 18.0:1 | 12.5:1 |
| Fuel Type | Diesel | Gasoline |
| Drive Type | 4WD | AWD |
| Transmission Type | Automatic | Manual |
| Number of Seats | 5 seats | 2 seats |
| Number of Doors | 4 doors | 2 doors |
| Vehicle Weight | 1770 kg | 895 kg |
| Vehicle Length | 5190 mm | 4440 mm |
| Vehicle Width | 1900 mm | 1910 mm |
| Vehicle Height | 1460 mm | 1260 mm |
| Wheelbase Size | 3080 mm | 2660 mm |
| Fuel Consumption Overall | 9.6 L/100km | 15.7 L/100km |
| Fuel Tank Capacity | 90 L | 90 L |
