2007 Audi S8 vs. 2008 BMW X5
To start off, 2008 BMW X5 is newer by 1 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 5,204 cc (10 cylinders), 2007 Audi S8 is equipped with a bigger engine. In terms of performance, 2007 Audi S8 (444 HP @ 7000 RPM) has 94 more horse power than 2008 BMW X5. (350 HP @ 6300 RPM). In normal driving conditions, 2007 Audi S8 should accelerate faster than 2008 BMW X5. With that said, vehicle weight also plays an important factor in acceleration. 2007 Audi S8 weights approximately 386 kg more than 2008 BMW X5. 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, 2007 Audi S8 (540 Nm @ 3400 RPM) has 65 more torque (in Nm) than 2008 BMW X5. (475 Nm @ 3400 RPM). This means 2007 Audi S8 will have an easier job in driving up hills or pulling heavy equipment than 2008 BMW X5.
Compare all specifications:
| 2007 Audi S8 | 2008 BMW X5 | |
| Make | Audi | BMW |
| Model | S8 | X5 |
| Year Released | 2007 | 2008 |
| Body Type | Sedan | SUV |
| Engine Position | Front | Front |
| Engine Size | 5204 cc | 4799 cc |
| Engine Cylinders | 10 cylinders | 8 cylinders |
| Engine Type | V | V |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 444 HP | 350 HP |
| Engine RPM | 7000 RPM | 6300 RPM |
| Torque | 540 Nm | 475 Nm |
| Torque RPM | 3400 RPM | 3400 RPM |
| Engine Bore Size | 84.5 mm | 93 mm |
| Engine Stroke Size | 92.8 mm | 88.3 mm |
| Engine Compression Ratio | 12.5:1 | 10.5:1 |
| Fuel Type | Gasoline | Gasoline - Premium |
| Top Speed | 260 km/hour | 242 km/hour |
| Acceleration 0-100mph | 5.4 seconds | 6.5 seconds |
| Drive Type | AWD | 4WD |
| Transmission Type | Automatic | Automatic |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 4 doors | 5 doors |
| Vehicle Weight | 1940 kg | 1554 kg |
| Vehicle Length | 5070 mm | 4860 mm |
| Vehicle Width | 1900 mm | 1940 mm |
| Vehicle Height | 1430 mm | 1740 mm |
| Wheelbase Size | 2950 mm | 2940 mm |
| Fuel Tank Capacity | 90 L | 85 L |
