2005 Audi S4 vs. 2009 Infiniti FX
To start off, 2009 Infiniti FX is newer by 4 year(s). Which means there will be less support and parts availability for 2005 Audi S4. In addition, the cost of maintenance, including insurance, on 2005 Audi S4 would be higher. At 5,026 cc (8 cylinders), 2009 Infiniti FX is equipped with a bigger engine. In terms of performance, 2009 Infiniti FX (385 HP @ 6500 RPM) has 45 more horse power than 2005 Audi S4. (340 HP @ 6300 RPM) In normal driving conditions, 2009 Infiniti FX should accelerate faster than 2005 Audi S4. With that said, vehicle weight also plays an important factor in acceleration. 2009 Infiniti FX weights approximately 280 kg more than 2005 Audi S4. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Let's talk about torque, 2009 Infiniti FX (500 Nm) has 90 more torque (in Nm) than 2005 Audi S4. (410 Nm). This means 2009 Infiniti FX will have an easier job in driving up hills or pulling heavy equipment than 2005 Audi S4.
Compare all specifications:
| 2005 Audi S4 | 2009 Infiniti FX | |
| Make | Audi | Infiniti |
| Model | S4 | FX |
| Year Released | 2005 | 2009 |
| Body Type | Convertible | Crossover |
| Engine Position | Front | Front |
| Engine Size | 4161 cc | 5026 cc |
| Engine Cylinders | 8 cylinders | 8 cylinders |
| Engine Type | V | V |
| Valves per Cylinder | 5 valves | 4 valves |
| Horse Power | 340 HP | 385 HP |
| Engine RPM | 6300 RPM | 6500 RPM |
| Torque | 410 Nm | 500 Nm |
| Engine Bore Size | 85 mm | 95.5 mm |
| Engine Stroke Size | 93 mm | 87.7 mm |
| Engine Compression Ratio | 11.0:1 | 10.9:1 |
| Number of Seats | 4 seats | 5 seats |
| Number of Doors | 2 doors | 5 doors |
| Vehicle Weight | 1840 kg | 2120 kg |
| Vehicle Length | 4580 mm | 4870 mm |
| Vehicle Width | 1780 mm | 1930 mm |
| Vehicle Height | 1400 mm | 1690 mm |
| Wheelbase Size | 2660 mm | 2890 mm |
| Fuel Consumption Overall | 11.8 L/100km | 13 L/100km |
| Fuel Tank Capacity | 63 L | 90 L |
