2007 Audi S8 vs. 2004 Audi S4
To start off, 2007 Audi S8 is newer by 3 year(s). Which means there will be less support and parts availability for 2004 Audi S4. In addition, the cost of maintenance, including insurance, on 2004 Audi S4 would be higher. At 5,204 cc (10 cylinders), 2007 Audi S8 is equipped with a bigger engine. In terms of performance, 2007 Audi S8 (444 HP @ 7000 RPM) has 105 more horse power than 2004 Audi S4. (339 HP @ 7000 RPM). In normal driving conditions, 2007 Audi S8 should accelerate faster than 2004 Audi S4. With that said, vehicle weight also plays an important factor in acceleration. 2007 Audi S8 weights approximately 175 kg more than 2004 Audi S4. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
With that said, do keep in mind that many other factors such as speed and the wear on your tires can also have significant impact on traction and control. Let's talk about torque, 2007 Audi S8 (540 Nm @ 3500 RPM) has 130 more torque (in Nm) than 2004 Audi S4. (410 Nm @ 3500 RPM). This means 2007 Audi S8 will have an easier job in driving up hills or pulling heavy equipment than 2004 Audi S4.
Compare all specifications:
| 2007 Audi S8 | 2004 Audi S4 | |
| Make | Audi | Audi |
| Model | S8 | S4 |
| Year Released | 2007 | 2004 |
| Body Type | Sedan | Sedan |
| Engine Position | Front | Front |
| Engine Size | 5204 cc | 4162 cc |
| Engine Cylinders | 10 cylinders | 8 cylinders |
| Engine Type | V | V |
| Valves per Cylinder | 4 valves | 5 valves |
| Horse Power | 444 HP | 339 HP |
| Engine RPM | 7000 RPM | 7000 RPM |
| Torque | 540 Nm | 410 Nm |
| Torque RPM | 3500 RPM | 3500 RPM |
| Engine Bore Size | 84.5 mm | 84.5 mm |
| Engine Stroke Size | 92.8 mm | 92.8 mm |
| Engine Compression Ratio | 12.5:1 | 11.0:1 |
| Top Speed | 250 km/hour | 250 km/hour |
| Acceleration 0-100mph | 5.1 seconds | 5.8 seconds |
| Drive Type | AWD | 4WD |
| Transmission Type | Automatic | Automatic |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 4 doors | 4 doors |
| Vehicle Weight | 1940 kg | 1765 kg |
| Vehicle Length | 5070 mm | 4590 mm |
| Vehicle Width | 1900 mm | 1780 mm |
| Vehicle Height | 1430 mm | 1430 mm |
| Wheelbase Size | 2950 mm | 2470 mm |
| Fuel Consumption Overall | 13.6 L/100km | 12.3 L/100km |
| Fuel Tank Capacity | 90 L | 63 L |
