2009 Audi S8 vs. 2005 Infiniti QX56
To start off, 2009 Audi S8 is newer by 4 year(s). Which means there will be less support and parts availability for 2005 Infiniti QX56. In addition, the cost of maintenance, including insurance, on 2005 Infiniti QX56 would be higher. At 5,555 cc (8 cylinders), 2005 Infiniti QX56 is equipped with a bigger engine. In terms of performance, 2009 Audi S8 (450 HP @ 7000 RPM) has 135 more horse power than 2005 Infiniti QX56. (315 HP @ 6400 RPM). In normal driving conditions, 2009 Audi S8 should accelerate faster than 2005 Infiniti QX56. With that said, vehicle weight also plays an important factor in acceleration. 2005 Infiniti QX56 weights approximately 1256 kg more than 2009 Audi S8.
Because 2009 Audi S8 is all wheel drive (AWD), it will have significant more traction and grip than 2005 Infiniti QX56. In wet, icy, snow, or gravel driving conditions, 2009 Audi S8 will offer significantly more control. 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 S8 (540 Nm) has 11 more torque (in Nm) than 2005 Infiniti QX56. (529 Nm). This means 2009 Audi S8 will have an easier job in driving up hills or pulling heavy equipment than 2005 Infiniti QX56.
Compare all specifications:
| 2009 Audi S8 | 2005 Infiniti QX56 | |
| Make | Audi | Infiniti |
| Model | S8 | QX56 |
| Year Released | 2009 | 2005 |
| Body Type | Sedan | SUV |
| Engine Position | Front | Front |
| Engine Size | 5204 cc | 5555 cc |
| Engine Cylinders | 10 cylinders | 8 cylinders |
| Engine Type | V | V |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 450 HP | 315 HP |
| Engine RPM | 7000 RPM | 6400 RPM |
| Torque | 540 Nm | 529 Nm |
| Engine Compression Ratio | 12.5:1 | 9.8:1 |
| Drive Type | AWD | Rear |
| Transmission Type | Automatic | Automatic |
| Number of Seats | 5 seats | 7 seats |
| Number of Doors | 4 doors | 5 doors |
| Vehicle Weight | 1175 kg | 2431 kg |
| Vehicle Length | 5070 mm | 5260 mm |
| Vehicle Width | 1900 mm | 2010 mm |
| Vehicle Height | 1430 mm | 1960 mm |
| Wheelbase Size | 2950 mm | 3140 mm |
| Fuel Consumption | 12.4 L/100km | 12.4 L/100km |
| Fuel Consumption City | 18.2 L/100km | 18.1 L/100km |
| Fuel Consumption Overall | 15.8 L/100km | 15.7 L/100km |
| Fuel Tank Capacity | 90 L | 106 L |
