2007 Audi S8 vs. 2008 Infiniti QX56
To start off, 2008 Infiniti QX56 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 5,552 cc (8 cylinders), 2008 Infiniti QX56 is equipped with a bigger engine. In terms of performance, 2007 Audi S8 (444 HP @ 7000 RPM) has 124 more horse power than 2008 Infiniti QX56. (320 HP @ 5200 RPM). In normal driving conditions, 2007 Audi S8 should accelerate faster than 2008 Infiniti QX56. With that said, vehicle weight also plays an important factor in acceleration. 2007 Audi S8 weights approximately 620 kg more than 2008 Infiniti QX56. 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 7 more torque (in Nm) than 2008 Infiniti QX56. (533 Nm @ 3400 RPM). This means 2007 Audi S8 will have an easier job in driving up hills or pulling heavy equipment than 2008 Infiniti QX56.
Compare all specifications:
| 2007 Audi S8 | 2008 Infiniti QX56 | |
| Make | Audi | Infiniti |
| Model | S8 | QX56 |
| Year Released | 2007 | 2008 |
| Body Type | Sedan | SUV |
| Engine Position | Front | Front |
| Engine Size | 5204 cc | 5552 cc |
| Engine Cylinders | 10 cylinders | 8 cylinders |
| Engine Type | V | V |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 444 HP | 320 HP |
| Engine RPM | 7000 RPM | 5200 RPM |
| Torque | 540 Nm | 533 Nm |
| Torque RPM | 3400 RPM | 3400 RPM |
| Drive Type | AWD | 4WD |
| Transmission Type | Automatic | Automatic |
| Number of Seats | 5 seats | 7 seats |
| Number of Doors | 4 doors | 5 doors |
| Vehicle Weight | 1940 kg | 1320 kg |
| Vehicle Length | 5070 mm | 5260 mm |
| Vehicle Width | 1900 mm | 2030 mm |
| Vehicle Height | 1430 mm | 2010 mm |
| Wheelbase Size | 2950 mm | 3140 mm |
| Fuel Tank Capacity | 90 L | 106 L |
