2007 Audi S4 vs. 2008 Audi A8
To start off, 2008 Audi A8 is newer by 1 year(s). Which means there will be less support and parts availability for 2007 Audi S4. In addition, the cost of maintenance, including insurance, on 2007 Audi S4 would be higher. At 4,163 cc (8 cylinders), 2007 Audi S4 is equipped with a bigger engine. In terms of performance, 2007 Audi S4 (341 HP @ 7000 RPM) has 134 more horse power than 2008 Audi A8. (207 HP @ 5500 RPM). In normal driving conditions, 2007 Audi S4 should accelerate faster than 2008 Audi A8.
Let's talk about torque, 2007 Audi S4 (410 Nm @ 3500 RPM) has 130 more torque (in Nm) than 2008 Audi A8. (280 Nm @ 3000 RPM). This means 2007 Audi S4 will have an easier job in driving up hills or pulling heavy equipment than 2008 Audi A8.
Compare all specifications:
| 2007 Audi S4 | 2008 Audi A8 | |
| Make | Audi | Audi |
| Model | S4 | A8 |
| Year Released | 2007 | 2008 |
| Body Type | Sedan | Sedan |
| Engine Position | Front | Front |
| Engine Size | 4163 cc | 2772 cc |
| Engine Cylinders | 8 cylinders | 6 cylinders |
| Engine Type | V | V |
| Valves per Cylinder | 5 valves | 4 valves |
| Horse Power | 341 HP | 207 HP |
| Engine RPM | 7000 RPM | 5500 RPM |
| Torque | 410 Nm | 280 Nm |
| Torque RPM | 3500 RPM | 3000 RPM |
| Engine Bore Size | 84.6 mm | 84.5 mm |
| Engine Stroke Size | 92.7 mm | 82.4 mm |
| Engine Compression Ratio | 11.0:1 | 12.5:1 |
| Fuel Type | Gasoline | Gasoline - Premium |
| Top Speed | 249 km/hour | 238 km/hour |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 4 doors | 4 doors |
| Vehicle Length | 4590 mm | 5070 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 |
