2005 Infiniti Q45 vs. 2007 Audi S4
To start off, 2007 Audi S4 is newer by 2 year(s). Which means there will be less support and parts availability for 2005 Infiniti Q45. In addition, the cost of maintenance, including insurance, on 2005 Infiniti Q45 would be higher. At 4,490 cc (8 cylinders), 2005 Infiniti Q45 is equipped with a bigger engine. In terms of performance, 2005 Infiniti Q45 (340 HP) has 1 more horse power than 2007 Audi S4. (339 HP). In normal driving conditions, 2005 Infiniti Q45 should accelerate faster than 2007 Audi S4. With that said, vehicle weight also plays an important factor in acceleration. 2005 Infiniti Q45 weights approximately 42 kg more than 2007 Audi S4. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 2007 Audi S4 is four wheel drive (4WD), it will have significant more traction and grip than 2005 Infiniti Q45. In wet, icy, snow, or gravel driving conditions, 2007 Audi S4 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, 2005 Infiniti Q45 (453 Nm) has 43 more torque (in Nm) than 2007 Audi S4. (410 Nm). This means 2005 Infiniti Q45 will have an easier job in driving up hills or pulling heavy equipment than 2007 Audi S4.
Compare all specifications:
| 2005 Infiniti Q45 | 2007 Audi S4 | |
| Make | Infiniti | Audi |
| Model | Q45 | S4 |
| Year Released | 2005 | 2007 |
| Body Type | Sedan | Station Wagon |
| Engine Position | Front | Front |
| Engine Size | 4490 cc | 4163 cc |
| Engine Cylinders | 8 cylinders | 8 cylinders |
| Engine Type | V | V |
| Valves per Cylinder | 4 valves | 5 valves |
| Horse Power | 340 HP | 339 HP |
| Torque | 453 Nm | 410 Nm |
| Engine Compression Ratio | 10.5:1 | 11.0:1 |
| Drive Type | Rear | 4WD |
| Transmission Type | Automatic | Automatic |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 4 doors | 5 doors |
| Vehicle Weight | 1837 kg | 1795 kg |
| Vehicle Length | 5080 mm | 4580 mm |
| Vehicle Width | 1850 mm | 1790 mm |
| Vehicle Height | 1500 mm | 1450 mm |
| Wheelbase Size | 2880 mm | 2660 mm |
| Fuel Consumption Overall | 11.8 L/100km | 13.4 L/100km |
| Fuel Tank Capacity | 81 L | 66 L |
