2005 Audi S8 vs. 2008 BMW X5
To start off, 2008 BMW X5 is newer by 3 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 4,799 cc (8 cylinders), 2008 BMW X5 is equipped with a bigger engine. In terms of performance, 2008 BMW X5 (351 HP @ 6300 RPM) has 104 more horse power than 2005 Audi S8. (247 HP @ 4000 RPM) In normal driving conditions, 2008 BMW X5 should accelerate faster than 2005 Audi S8. With that said, vehicle weight also plays an important factor in acceleration. 2008 BMW X5 weights approximately 430 kg more than 2005 Audi S8. 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, 2008 BMW X5 (475 Nm @ 3400 RPM) has 25 more torque (in Nm) than 2005 Audi S8. (450 Nm @ 3400 RPM). This means 2008 BMW X5 will have an easier job in driving up hills or pulling heavy equipment than 2005 Audi S8.
Compare all specifications:
| 2005 Audi S8 | 2008 BMW X5 | |
| Make | Audi | BMW |
| Model | S8 | X5 |
| Year Released | 2005 | 2008 |
| Body Type | Sedan | SUV |
| Engine Position | Front | Front |
| Engine Size | 4172 cc | 4799 cc |
| Engine Cylinders | 8 cylinders | 8 cylinders |
| Engine Type | V | V |
| Valves per Cylinder | 5 valves | 4 valves |
| Horse Power | 247 HP | 351 HP |
| Engine RPM | 4000 RPM | 6300 RPM |
| Torque | 450 Nm | 475 Nm |
| Torque RPM | 3400 RPM | 3400 RPM |
| Drive Type | AWD | 4WD |
| Transmission Type | Automatic | Automatic |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 4 doors | 5 doors |
| Vehicle Weight | 1770 kg | 2200 kg |
| Wheelbase Size | 2290 mm | 2940 mm |
| Fuel Tank Capacity | 90 L | 85 L |
