1999 Audi S8 vs. 2007 Audi S4
To start off, 2007 Audi S4 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 4,172 cc (8 cylinders), 1999 Audi S8 is equipped with a bigger engine. In terms of performance, 2007 Audi S4 (340 HP @ 7000 RPM) has 5 more horse power than 1999 Audi S8. (335 HP @ 7000 RPM) In normal driving conditions, 2007 Audi S4 should accelerate faster than 1999 Audi S8. With that said, vehicle weight also plays an important factor in acceleration. 1999 Audi S8 weights approximately 455 kg more than 2007 Audi S4.
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 S4 (411 Nm @ 3500 RPM) has 80 more torque (in Nm) than 1999 Audi S8. (331 Nm @ 3400 RPM). This means 2007 Audi S4 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 S4 | |
| Make | Audi | Audi |
| Model | S8 | S4 |
| Year Released | 1999 | 2007 |
| 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 | 340 HP |
| Engine RPM | 7000 RPM | 7000 RPM |
| Torque | 331 Nm | 411 Nm |
| Torque RPM | 3400 RPM | 3500 RPM |
| Engine Bore Size | 84.5 mm | 84.5 mm |
| Engine Stroke Size | 93 mm | 93 mm |
| Top Speed | 250 km/hour | 250 km/hour |
| Acceleration 0-100mph | 5.4 seconds | 5.9 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 | 1275 kg |
| Vehicle Length | 5040 mm | 4580 mm |
| Vehicle Width | 1890 mm | 1790 mm |
| Vehicle Height | 1420 mm | 1450 mm |
| Wheelbase Size | 2890 mm | 2660 mm |
| Fuel Consumption | 9.7 L/100km | 11.2 L/100km |
| Fuel Consumption City | 20.8 L/100km | 15.7 L/100km |
| Fuel Consumption Overall | 13.7 L/100km | 13.8 L/100km |
| Fuel Tank Capacity | 90 L | 63 L |
