2009 Audi Q7 vs. 2007 Audi S8
To start off, 2009 Audi Q7 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 5,934 cc (12 cylinders), 2009 Audi Q7 is equipped with a bigger engine. In terms of performance, 2009 Audi Q7 (494 HP @ 3750 RPM) has 50 more horse power than 2007 Audi S8. (444 HP @ 7000 RPM). In normal driving conditions, 2009 Audi Q7 should accelerate faster than 2007 Audi S8. With that said, vehicle weight also plays an important factor in acceleration. 2009 Audi Q7 weights approximately 665 kg more than 2007 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, 2009 Audi Q7 (1,000 Nm @ 1750 RPM) has 460 more torque (in Nm) than 2007 Audi S8. (540 Nm @ 3400 RPM). This means 2009 Audi Q7 will have an easier job in driving up hills or pulling heavy equipment than 2007 Audi S8.
Compare all specifications:
| 2009 Audi Q7 | 2007 Audi S8 | |
| Make | Audi | Audi |
| Model | Q7 | S8 |
| Year Released | 2009 | 2007 |
| Body Type | SUV | Sedan |
| Engine Position | Front | Front |
| Engine Size | 5934 cc | 5204 cc |
| Engine Cylinders | 12 cylinders | 10 cylinders |
| Engine Type | V | V |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 494 HP | 444 HP |
| Engine RPM | 3750 RPM | 7000 RPM |
| Torque | 1000 Nm | 540 Nm |
| Torque RPM | 1750 RPM | 3400 RPM |
| Engine Bore Size | 83 mm | 84.5 mm |
| Engine Stroke Size | 91.4 mm | 92.8 mm |
| Engine Compression Ratio | 16.0:1 | 12.5:1 |
| Fuel Type | Diesel | Gasoline |
| Top Speed | 250 km/hour | 260 km/hour |
| Acceleration 0-100mph | 5.5 seconds | 5.4 seconds |
| Drive Type | 4WD | AWD |
| Transmission Type | Automatic | Automatic |
| Number of Doors | 5 doors | 4 doors |
| Vehicle Weight | 2605 kg | 1940 kg |
| Vehicle Length | 5070 mm | 5070 mm |
| Vehicle Width | 2010 mm | 1900 mm |
| Vehicle Height | 1700 mm | 1430 mm |
| Wheelbase Size | 3010 mm | 2950 mm |
| Fuel Tank Capacity | 100 L | 90 L |
