2007 Audi S8 vs. 2009 BMW X5
To start off, 2009 BMW X5 is newer by 2 year(s). Which means there will be less support and parts availability for 2007 Audi S8. In addition, the cost of maintenance, including insurance, on 2007 Audi S8 would be higher. At 4,171 cc (8 cylinders), 2007 Audi S8 is equipped with a bigger engine. With that said, vehicle weight also plays an important factor in acceleration. 2009 BMW X5 weights approximately 400 kg more than 2007 Audi S8.
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, 2009 BMW X5 (580 Nm @ 1750 RPM) has 150 more torque (in Nm) than 2007 Audi S8. (430 Nm @ 3400 RPM). This means 2009 BMW X5 will have an easier job in driving up hills or pulling heavy equipment than 2007 Audi S8.
Compare all specifications:
| 2007 Audi S8 | 2009 BMW X5 | |
| Make | Audi | BMW |
| Model | S8 | X5 |
| Year Released | 2007 | 2009 |
| Body Type | Sedan | SUV |
| Engine Position | Front | Front |
| Engine Size | 4171 cc | 2993 cc |
| Engine Cylinders | 8 cylinders | 6 cylinders |
| Engine Type | V | in-line |
| Valves per Cylinder | 5 valves | 4 valves |
| Horse Power | 0 HP | 282 HP |
| Torque | 430 Nm | 580 Nm |
| Torque RPM | 3400 RPM | 1750 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 | 1750 kg | 2150 kg |
| Wheelbase Size | 2290 mm | 2940 mm |
| Fuel Tank Capacity | 90 L | 85 L |
