2005 Audi S4 vs. 2007 Audi A8
To start off, 2007 Audi A8 is newer by 2 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 2007 Audi A8. (230 HP @ 4000 RPM). In normal driving conditions, 2005 Audi S4 should accelerate faster than 2007 Audi A8. With that said, vehicle weight also plays an important factor in acceleration. 2005 Audi S4 weights approximately 10 kg more than 2007 Audi A8. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Let's talk about torque, 2007 Audi A8 (450 Nm) has 40 more torque (in Nm) than 2005 Audi S4. (410 Nm). This means 2007 Audi A8 will have an easier job in driving up hills or pulling heavy equipment than 2005 Audi S4.
Compare all specifications:
| 2005 Audi S4 | 2007 Audi A8 | |
| Make | Audi | Audi |
| Model | S4 | A8 |
| Year Released | 2005 | 2007 |
| Body Type | Convertible | Sedan |
| Engine Position | Front | Front |
| Engine Size | 4161 cc | 2967 cc |
| Engine Cylinders | 8 cylinders | 6 cylinders |
| Engine Type | V | V |
| Valves per Cylinder | 5 valves | 4 valves |
| Horse Power | 340 HP | 230 HP |
| Engine RPM | 6300 RPM | 4000 RPM |
| Torque | 410 Nm | 450 Nm |
| Engine Compression Ratio | 11.0:1 | 17.0:1 |
| Number of Seats | 4 seats | 5 seats |
| Number of Doors | 2 doors | 4 doors |
| Vehicle Weight | 1840 kg | 1830 kg |
| Vehicle Length | 4580 mm | 5060 mm |
| Vehicle Width | 1780 mm | 1900 mm |
| Vehicle Height | 1400 mm | 1450 mm |
| Wheelbase Size | 2660 mm | 3080 mm |
| Fuel Consumption Overall | 11.8 L/100km | 8.4 L/100km |
| Fuel Tank Capacity | 63 L | 90 L |
