2008 Acura RDX vs. 2005 Audi A8
To start off, 2008 Acura RDX 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 4,170 cc (8 cylinders), 2005 Audi A8 is equipped with a bigger engine. In terms of performance, 2005 Audi A8 (330 HP @ 6500 RPM) has 90 more horse power than 2008 Acura RDX. (240 HP @ 4500 RPM) In normal driving conditions, 2005 Audi A8 should accelerate faster than 2008 Acura RDX. With that said, vehicle weight also plays an important factor in acceleration. 2005 Audi A8 weights approximately 405 kg more than 2008 Acura RDX. 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, 2005 Audi A8 (430 Nm @ 3500 RPM) has 77 more torque (in Nm) than 2008 Acura RDX. (353 Nm @ 4500 RPM). This means 2005 Audi A8 will have an easier job in driving up hills or pulling heavy equipment than 2008 Acura RDX.
Compare all specifications:
| 2008 Acura RDX | 2005 Audi A8 | |
| Make | Acura | Audi |
| Model | RDX | A8 |
| Year Released | 2008 | 2005 |
| Body Type | SUV | Sedan |
| Engine Position | Front | Front |
| Engine Size | 2299 cc | 4170 cc |
| Engine Cylinders | 4 cylinders | 8 cylinders |
| Engine Type | in-line | V |
| Horse Power | 240 HP | 330 HP |
| Engine RPM | 4500 RPM | 6500 RPM |
| Torque | 353 Nm | 430 Nm |
| Torque RPM | 4500 RPM | 3500 RPM |
| Engine Compression Ratio | 8.8:1 | 11.0:1 |
| Fuel Type | Gasoline | Gasoline - Premium |
| Drive Type | 4WD | 4WD |
| Transmission Type | Automatic | Automatic |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 5 doors | 4 doors |
| Vehicle Weight | 1450 kg | 1855 kg |
| Vehicle Length | 4600 mm | 5060 mm |
| Vehicle Width | 1880 mm | 1900 mm |
| Vehicle Height | 1660 mm | 1450 mm |
| Wheelbase Size | 2660 mm | 2770 mm |
| Fuel Consumption Overall | 12.4 L/100km | 11.9 L/100km |
| Fuel Tank Capacity | 68 L | 90 L |
