2008 Audi S4 vs. 1999 Audi A8
To start off, 2008 Audi S4 is newer by 9 year(s). Which means there will be less support and parts availability for 1999 Audi A8. In addition, the cost of maintenance, including insurance, on 1999 Audi A8 would be higher. At 4,161 cc (8 cylinders), 2008 Audi S4 is equipped with a bigger engine. In terms of performance, 2008 Audi S4 (340 HP @ 7000 RPM) has 150 more horse power than 1999 Audi A8. (190 HP @ 6000 RPM). In normal driving conditions, 2008 Audi S4 should accelerate faster than 1999 Audi A8. With that said, vehicle weight also plays an important factor in acceleration. 2008 Audi S4 weights approximately 70 kg more than 1999 Audi A8. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Both vehicles are four wheel drive (4WD) - it offers better handling, traction, and control in all driving conditions compared with front wheel drive or rear wheel drive vehicles. 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, 2008 Audi S4 (410 Nm @ 3500 RPM) has 130 more torque (in Nm) than 1999 Audi A8. (280 Nm @ 3200 RPM). This means 2008 Audi S4 will have an easier job in driving up hills or pulling heavy equipment than 1999 Audi A8.
Compare all specifications:
| 2008 Audi S4 | 1999 Audi A8 | |
| Make | Audi | Audi |
| Model | S4 | A8 |
| Year Released | 2008 | 1999 |
| Body Type | Sedan | Sedan |
| Engine Position | Front | Front |
| Engine Size | 4161 cc | 2771 cc |
| Engine Cylinders | 8 cylinders | 6 cylinders |
| Engine Type | V | in-line |
| Valves per Cylinder | 5 valves | 5 valves |
| Horse Power | 340 HP | 190 HP |
| Engine RPM | 7000 RPM | 6000 RPM |
| Torque | 410 Nm | 280 Nm |
| Torque RPM | 3500 RPM | 3200 RPM |
| Fuel Type | Gasoline | Gasoline |
| Top Speed | 250 km/hour | 235 km/hour |
| Drive Type | 4WD | 4WD |
| Transmission Type | Automatic | Automatic |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 4 doors | 4 doors |
| Vehicle Weight | 1705 kg | 1635 kg |
| Vehicle Length | 4590 mm | 5040 mm |
| Vehicle Width | 1780 mm | 1890 mm |
| Vehicle Height | 1430 mm | 1440 mm |
| Wheelbase Size | 2650 mm | 2890 mm |
