2006 Audi A8 vs. 2007 Audi S4
To start off, 2007 Audi S4 is newer by 1 year(s). Which means there will be less support and parts availability for 2006 Audi A8. In addition, the cost of maintenance, including insurance, on 2006 Audi A8 would be higher. At 4,172 cc (8 cylinders), 2006 Audi A8 is equipped with a bigger engine. In terms of performance, 2007 Audi S4 (339 HP @ 7000 RPM) has 10 more horse power than 2006 Audi A8. (329 HP @ 6500 RPM) In normal driving conditions, 2007 Audi S4 should accelerate faster than 2006 Audi A8. With that said, vehicle weight also plays an important factor in acceleration. 2006 Audi A8 weights approximately 120 kg more than 2007 Audi S4.
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, 2006 Audi A8 (430 Nm @ 3500 RPM) has 20 more torque (in Nm) than 2007 Audi S4. (410 Nm @ 3500 RPM). This means 2006 Audi A8 will have an easier job in driving up hills or pulling heavy equipment than 2007 Audi S4.
Compare all specifications:
| 2006 Audi A8 | 2007 Audi S4 | |
| Make | Audi | Audi |
| Model | A8 | S4 |
| Year Released | 2006 | 2007 |
| Body Type | Sedan | Sedan |
| Engine Position | Front | Front |
| Engine Size | 4172 cc | 4163 cc |
| Engine Cylinders | 8 cylinders | 8 cylinders |
| Engine Type | V | V |
| Valves per Cylinder | 5 valves | 5 valves |
| Horse Power | 329 HP | 339 HP |
| Engine RPM | 6500 RPM | 7000 RPM |
| Torque | 430 Nm | 410 Nm |
| Torque RPM | 3500 RPM | 3500 RPM |
| Engine Bore Size | 84.6 mm | 84.5 mm |
| Engine Stroke Size | 93 mm | 92.8 mm |
| Engine Compression Ratio | 11.0:1 | 11.0:1 |
| Fuel Type | Gasoline - Premium | Gasoline - Premium |
| Acceleration 0-100mph | 6.3 seconds | 5.9 seconds |
| Drive Type | 4WD | 4WD |
| Transmission Type | Manual | Manual |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 4 doors | 4 doors |
| Vehicle Weight | 1855 kg | 1735 kg |
| Vehicle Length | 5060 mm | 4580 mm |
| Vehicle Width | 1900 mm | 1790 mm |
| Vehicle Height | 1450 mm | 1420 mm |
| Wheelbase Size | 2950 mm | 2660 mm |
| Fuel Consumption Overall | 8.8 L/100km | 13.4 L/100km |
| Fuel Tank Capacity | 90 L | 63 L |
