2009 Audi A4 vs. 2005 Audi S4
To start off, 2009 Audi A4 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 4,161 cc (8 cylinders), 2005 Audi S4 is equipped with a bigger engine. In terms of performance, 2005 Audi S4 (340 HP @ 6300 RPM) has 110 more horse power than 2009 Audi A4. (230 HP @ 4000 RPM) In normal driving conditions, 2005 Audi S4 should accelerate faster than 2009 Audi A4. With that said, vehicle weight also plays an important factor in acceleration. 2005 Audi S4 weights approximately 46 kg more than 2009 Audi A4. 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 A4 (450 Nm) has 40 more torque (in Nm) than 2005 Audi S4. (410 Nm). This means 2009 Audi A4 will have an easier job in driving up hills or pulling heavy equipment than 2005 Audi S4.
Compare all specifications:
| 2009 Audi A4 | 2005 Audi S4 | |
| Make | Audi | Audi |
| Model | A4 | S4 |
| Year Released | 2009 | 2005 |
| Body Type | Convertible | Convertible |
| Engine Position | Front | Front |
| Engine Size | 2967 cc | 4161 cc |
| Engine Cylinders | 6 cylinders | 8 cylinders |
| Engine Type | V | V |
| Valves per Cylinder | 4 valves | 5 valves |
| Horse Power | 230 HP | 340 HP |
| Engine RPM | 4000 RPM | 6300 RPM |
| Torque | 450 Nm | 410 Nm |
| Engine Bore Size | 83 mm | 85 mm |
| Engine Stroke Size | 91.4 mm | 93 mm |
| Engine Compression Ratio | 17.0:1 | 11.0:1 |
| Number of Seats | 4 seats | 4 seats |
| Number of Doors | 2 doors | 2 doors |
| Vehicle Weight | 1794 kg | 1840 kg |
| Vehicle Length | 4580 mm | 4580 mm |
| Vehicle Width | 1780 mm | 1780 mm |
| Vehicle Height | 1400 mm | 1400 mm |
| Wheelbase Size | 2660 mm | 2660 mm |
| Fuel Consumption Overall | 8 L/100km | 11.8 L/100km |
| Fuel Tank Capacity | 63 L | 63 L |
