1999 Audi S8 vs. 2007 Audi RS4
To start off, 2007 Audi RS4 is newer by 8 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 4,170 cc (8 cylinders), 1999 Audi S8 is equipped with a bigger engine. In terms of performance, 2007 Audi RS4 (420 HP @ 8205 RPM) has 173 more horse power than 1999 Audi S8. (247 HP @ 7000 RPM) In normal driving conditions, 2007 Audi RS4 should accelerate faster than 1999 Audi S8. With that said, vehicle weight also plays an important factor in acceleration. 1999 Audi S8 weights approximately 50 kg more than 2007 Audi RS4.
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 RS4 (430 Nm @ 5500 RPM) has 100 more torque (in Nm) than 1999 Audi S8. (330 Nm @ 3400 RPM). This means 2007 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 | 2007 Audi RS4 | |
| Make | Audi | Audi |
| Model | S8 | RS4 |
| Year Released | 1999 | 2007 |
| Body Type | Sedan | Sedan |
| Engine Position | Front | Front |
| Engine Size | 4170 cc | 4161 cc |
| Engine Cylinders | 8 cylinders | 8 cylinders |
| Engine Type | V | V |
| Horse Power | 247 HP | 420 HP |
| Engine RPM | 7000 RPM | 8205 RPM |
| Torque | 330 Nm | 430 Nm |
| Torque RPM | 3400 RPM | 5500 RPM |
| Top Speed | 250 km/hour | 249 km/hour |
| Drive Type | AWD | 4WD |
| Transmission Type | Automatic | Automatic |
| Number of Seats | 5 seats | 4 seats |
| Number of Doors | 4 doors | 5 doors |
| Vehicle Weight | 1750 kg | 1700 kg |
| Vehicle Width | 1890 mm | 1820 mm |
