2005 Audi A8 vs. 2006 Audi S4
To start off, 2006 Audi S4 is newer by 1 year(s). Which means there will be less support and parts availability for 2005 Audi A8. In addition, the cost of maintenance, including insurance, on 2005 Audi A8 would be higher. At 4,178 cc (8 cylinders), 2005 Audi A8 is equipped with a bigger engine. In terms of performance, 2006 Audi S4 (340 HP @ 7000 RPM) has 5 more horse power than 2005 Audi A8. (335 HP @ 4000 RPM) In normal driving conditions, 2006 Audi S4 should accelerate faster than 2005 Audi A8. With that said, vehicle weight also plays an important factor in acceleration. 2005 Audi A8 weights approximately 415 kg more than 2006 Audi S4.
Let's talk about torque, 2005 Audi A8 (430 Nm) has 20 more torque (in Nm) than 2006 Audi S4. (410 Nm). This means 2005 Audi A8 will have an easier job in driving up hills or pulling heavy equipment than 2006 Audi S4.
Compare all specifications:
| 2005 Audi A8 | 2006 Audi S4 | |
| Make | Audi | Audi |
| Model | A8 | S4 |
| Year Released | 2005 | 2006 |
| Body Type | Sedan | Sedan |
| Engine Position | Front | Front |
| Engine Size | 4178 cc | 4163 cc |
| Engine Cylinders | 8 cylinders | 8 cylinders |
| Engine Type | V | V |
| Valves per Cylinder | 5 valves | 5 valves |
| Horse Power | 335 HP | 340 HP |
| Engine RPM | 4000 RPM | 7000 RPM |
| Torque | 430 Nm | 410 Nm |
| Engine Bore Size | 85 mm | 84.6 mm |
| Engine Stroke Size | 93 mm | 93 mm |
| Engine Compression Ratio | 11.0:1 | 11.0:1 |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 4 doors | 4 doors |
| Vehicle Weight | 1945 kg | 1530 kg |
| Vehicle Length | 5060 mm | 4590 mm |
| Vehicle Width | 1900 mm | 1790 mm |
| Vehicle Height | 1450 mm | 1420 mm |
| Wheelbase Size | 2950 mm | 2660 mm |
| Fuel Consumption | 9.8 L/100km | 11.2 L/100km |
| Fuel Consumption City | 13.1 L/100km | 15.7 L/100km |
| Fuel Consumption Overall | 11.8 L/100km | 13.8 L/100km |
| Fuel Tank Capacity | 90 L | 63 L |
