2008 Audi S5 vs. 2009 Infiniti QX56
To start off, 2009 Infiniti QX56 is newer by 1 year(s). Which means there will be less support and parts availability for 2008 Audi S5. In addition, the cost of maintenance, including insurance, on 2008 Audi S5 would be higher. At 5,552 cc (8 cylinders), 2009 Infiniti QX56 is equipped with a bigger engine. In terms of performance, 2008 Audi S5 (354 HP @ 6800 RPM) has 34 more horse power than 2009 Infiniti QX56. (320 HP @ 5200 RPM). In normal driving conditions, 2008 Audi S5 should accelerate faster than 2009 Infiniti QX56. With that said, vehicle weight also plays an important factor in acceleration. 2008 Audi S5 weights approximately 445 kg more than 2009 Infiniti QX56. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Both vehicles are four wheel drive (4WD) - it offers better handling, traction, and control in all driving conditions compared with front wheel drive or rear wheel drive vehicles. 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 Infiniti QX56 (533 Nm @ 3400 RPM) has 92 more torque (in Nm) than 2008 Audi S5. (441 Nm @ 3500 RPM). This means 2009 Infiniti QX56 will have an easier job in driving up hills or pulling heavy equipment than 2008 Audi S5. 2009 Infiniti QX56 has automatic transmission and 2008 Audi S5 has manual transmission. 2008 Audi S5 will offer better control over acceleration and deceleration in addition to better fuel efficiency overall. 2009 Infiniti QX56 will be easier to drive especially in heavy traffic.
Compare all specifications:
| 2008 Audi S5 | 2009 Infiniti QX56 | |
| Make | Audi | Infiniti |
| Model | S5 | QX56 |
| Year Released | 2008 | 2009 |
| Body Type | Coupe | SUV |
| Engine Position | Front | Front |
| Engine Size | 4163 cc | 5552 cc |
| Engine Cylinders | 8 cylinders | 8 cylinders |
| Engine Type | V | V |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 354 HP | 320 HP |
| Engine RPM | 6800 RPM | 5200 RPM |
| Torque | 441 Nm | 533 Nm |
| Torque RPM | 3500 RPM | 3400 RPM |
| Fuel Type | Gasoline - Premium | Gasoline |
| Drive Type | 4WD | 4WD |
| Transmission Type | Manual | Automatic |
| Number of Seats | 5 seats | 7 seats |
| Number of Doors | 2 doors | 5 doors |
| Vehicle Weight | 1765 kg | 1320 kg |
| Vehicle Length | 4640 mm | 5260 mm |
| Vehicle Width | 1990 mm | 2010 mm |
| Vehicle Height | 1380 mm | 2010 mm |
| Wheelbase Size | 2760 mm | 3140 mm |
| Fuel Consumption Overall | 7.8 L/100km | 16.8 L/100km |
| Fuel Tank Capacity | 63 L | 106 L |
