1999 Audi S8 vs. 2006 Audi RS4
To start off, 2006 Audi RS4 is newer by 7 year(s). Which means there will be less support and parts availability for 1999 Audi S8. In addition, the cost of maintenance, including insurance, on 1999 Audi S8 would be higher. At 4,172 cc (8 cylinders), 1999 Audi S8 is equipped with a bigger engine. In terms of performance, 2006 Audi RS4 (415 HP @ 7800 RPM) has 80 more horse power than 1999 Audi S8. (335 HP @ 7000 RPM) In normal driving conditions, 2006 Audi RS4 should accelerate faster than 1999 Audi S8. With that said, vehicle weight also plays an important factor in acceleration. 2006 Audi RS4 weights approximately 115 kg more than 1999 Audi S8. 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, 2006 Audi RS4 (430 Nm @ 5500 RPM) has 99 more torque (in Nm) than 1999 Audi S8. (331 Nm @ 3400 RPM). This means 2006 Audi RS4 will have an easier job in driving up hills or pulling heavy equipment than 1999 Audi S8.
Compare all specifications:
| 1999 Audi S8 | 2006 Audi RS4 | |
| Make | Audi | Audi |
| Model | S8 | RS4 |
| Year Released | 1999 | 2006 |
| Body Type | Sedan | Convertible |
| Engine Position | Front | Front |
| Engine Size | 4172 cc | 4163 cc |
| Engine Cylinders | 8 cylinders | 8 cylinders |
| Engine Type | V | V |
| Horse Power | 335 HP | 415 HP |
| Engine RPM | 7000 RPM | 7800 RPM |
| Torque | 331 Nm | 430 Nm |
| Torque RPM | 3400 RPM | 5500 RPM |
| Engine Bore Size | 84.5 mm | 84.5 mm |
| Engine Stroke Size | 93 mm | 92.8 mm |
| Top Speed | 250 km/hour | 250 km/hour |
| Acceleration 0-100mph | 5.4 seconds | 4.9 seconds |
| Drive Type | AWD | 4WD |
| Transmission Type | Manual | Manual |
| Number of Seats | 5 seats | 4 seats |
| Number of Doors | 4 doors | 2 doors |
| Vehicle Weight | 1730 kg | 1845 kg |
| Vehicle Length | 5040 mm | 4560 mm |
| Vehicle Width | 1890 mm | 1820 mm |
| Vehicle Height | 1420 mm | 1400 mm |
| Wheelbase Size | 2890 mm | 2660 mm |
| Fuel Consumption Overall | 13.7 L/100km | 13.9 L/100km |
| Fuel Tank Capacity | 90 L | 63 L |
