2009 Acura RDX vs. 2005 Audi S8
To start off, 2009 Acura RDX is newer by 4 year(s). Which means there will be less support and parts availability for 2005 Audi S8. In addition, the cost of maintenance, including insurance, on 2005 Audi S8 would be higher. At 4,172 cc (8 cylinders), 2005 Audi S8 is equipped with a bigger engine. In terms of performance, 2005 Audi S8 (247 HP @ 4000 RPM) has 7 more horse power than 2009 Acura RDX. (240 HP @ 6000 RPM) In normal driving conditions, 2005 Audi S8 should accelerate faster than 2009 Acura RDX. With that said, vehicle weight also plays an important factor in acceleration. 2005 Audi S8 weights approximately 320 kg more than 2009 Acura RDX. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
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 S8 (450 Nm @ 3400 RPM) has 97 more torque (in Nm) than 2009 Acura RDX. (353 Nm @ 4500 RPM). This means 2005 Audi S8 will have an easier job in driving up hills or pulling heavy equipment than 2009 Acura RDX.
Compare all specifications:
| 2009 Acura RDX | 2005 Audi S8 | |
| Make | Acura | Audi |
| Model | RDX | S8 |
| Year Released | 2009 | 2005 |
| Body Type | SUV | Sedan |
| Engine Position | Front | Front |
| Engine Size | 2300 cc | 4172 cc |
| Engine Cylinders | 4 cylinders | 8 cylinders |
| Engine Type | in-line | V |
| Valves per Cylinder | 4 valves | 5 valves |
| Horse Power | 240 HP | 247 HP |
| Engine RPM | 6000 RPM | 4000 RPM |
| Torque | 353 Nm | 450 Nm |
| Torque RPM | 4500 RPM | 3400 RPM |
| Drive Type | 4WD | AWD |
| Transmission Type | Automatic | Automatic |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 5 doors | 4 doors |
| Vehicle Weight | 1450 kg | 1770 kg |
| Wheelbase Size | 2660 mm | 2290 mm |
| Fuel Tank Capacity | 68 L | 90 L |
