2005 Audi S4 vs. 2009 Audi S5
To start off, 2009 Audi S5 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. Both 2005 Audi S4 and 2009 Audi S5 are equipped with a 4,163 cc engine. In terms of performance, 2009 Audi S5 (354 HP @ 6800 RPM) has 14 more horse power than 2005 Audi S4. (340 HP @ 6300 RPM) In normal driving conditions, 2009 Audi S5 should accelerate faster than 2005 Audi S4. With that said, vehicle weight also plays an important factor in acceleration. 2009 Audi S5 weights approximately 35 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 Audi S5 (441 Nm) has 31 more torque (in Nm) than 2005 Audi S4. (410 Nm). This means 2009 Audi S5 will have an easier job in driving up hills or pulling heavy equipment than 2005 Audi S4.
Compare all specifications:
| 2005 Audi S4 | 2009 Audi S5 | |
| Make | Audi | Audi |
| Model | S4 | S5 |
| Year Released | 2005 | 2009 |
| Body Type | Sedan | Coupe |
| Engine Position | Front | Front |
| Engine Size | 4163 cc | 4163 cc |
| Engine Cylinders | 8 cylinders | 8 cylinders |
| Engine Type | V | V |
| Valves per Cylinder | 5 valves | 4 valves |
| Horse Power | 340 HP | 354 HP |
| Engine RPM | 6300 RPM | 6800 RPM |
| Torque | 410 Nm | 441 Nm |
| Engine Bore Size | 85.1 mm | 84.5 mm |
| Engine Stroke Size | 93 mm | 92.8 mm |
| Engine Compression Ratio | 11.0:1 | 12.5:1 |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 4 doors | 2 doors |
| Vehicle Weight | 1735 kg | 1770 kg |
| Vehicle Length | 4550 mm | 4640 mm |
| Vehicle Width | 1770 mm | 1990 mm |
| Vehicle Height | 1430 mm | 1380 mm |
| Wheelbase Size | 2660 mm | 2760 mm |
| Fuel Consumption | 11.2 L/100km | 11.2 L/100km |
| Fuel Consumption City | 15.7 L/100km | 16.8 L/100km |
| Fuel Consumption Overall | 13.8 L/100km | 14.7 L/100km |
| Fuel Tank Capacity | 63 L | 63 L |
