2007 Audi S4 vs. 2005 Audi A8
To start off, 2007 Audi S4 is newer by 2 year(s). Which means there will be less support and parts availability for 2005 Audi A8. In addition, the cost of maintenance, including insurance, on 2005 Audi A8 would be higher. At 4,178 cc (8 cylinders), 2005 Audi A8 is equipped with a bigger engine. In terms of performance, 2007 Audi S4 (341 HP @ 7000 RPM) has 6 more horse power than 2005 Audi A8. (335 HP @ 4000 RPM). In normal driving conditions, 2007 Audi S4 should accelerate faster than 2005 Audi A8.
Let's talk about torque, 2005 Audi A8 (430 Nm) has 20 more torque (in Nm) than 2007 Audi S4. (410 Nm). This means 2005 Audi A8 will have an easier job in driving up hills or pulling heavy equipment than 2007 Audi S4.
Compare all specifications:
| 2007 Audi S4 | 2005 Audi A8 | |
| Make | Audi | Audi |
| Model | S4 | A8 |
| Year Released | 2007 | 2005 |
| Body Type | Sedan | Sedan |
| Engine Position | Front | Front |
| Engine Size | 4163 cc | 4178 cc |
| Engine Cylinders | 8 cylinders | 8 cylinders |
| Engine Type | V | V |
| Valves per Cylinder | 5 valves | 5 valves |
| Horse Power | 341 HP | 335 HP |
| Engine RPM | 7000 RPM | 4000 RPM |
| Torque | 410 Nm | 430 Nm |
| Engine Bore Size | 84.6 mm | 85 mm |
| Engine Stroke Size | 92.7 mm | 93 mm |
| Engine Compression Ratio | 11.0:1 | 11.0:1 |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 4 doors | 4 doors |
| Vehicle Length | 4590 mm | 5060 mm |
| Vehicle Width | 1730 mm | 1900 mm |
| Vehicle Height | 1430 mm | 1450 mm |
| Wheelbase Size | 2650 mm | 2950 mm |
| Fuel Tank Capacity | 63 L | 90 L |
