2005 Audi A8 vs. 2005 Audi S4
To start off, both 2005 Audi A8 and 2005 Audi S4 were released in the same year (2005). Therefore the support and the availability on parts for both vehicles should be relatively similar. At 4,163 cc (8 cylinders), 2005 Audi S4 is equipped with a bigger engine. In terms of performance, 2005 Audi S4 (340 HP @ 6300 RPM) has 18 more horse power than 2005 Audi A8. (322 HP @ 3750 RPM) In normal driving conditions, 2005 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 210 kg more than 2005 Audi S4.
Let's talk about torque, 2005 Audi A8 (650 Nm) has 240 more torque (in Nm) than 2005 Audi S4. (410 Nm). This means 2005 Audi A8 will have an easier job in driving up hills or pulling heavy equipment than 2005 Audi S4.
Compare all specifications:
| 2005 Audi A8 | 2005 Audi S4 | |
| Make | Audi | Audi |
| Model | A8 | S4 |
| Year Released | 2005 | 2005 |
| Body Type | Sedan | Sedan |
| Engine Position | Front | Front |
| Engine Size | 4134 cc | 4163 cc |
| Engine Cylinders | 8 cylinders | 8 cylinders |
| Engine Type | V | V |
| Valves per Cylinder | 4 valves | 5 valves |
| Horse Power | 322 HP | 340 HP |
| Engine RPM | 3750 RPM | 6300 RPM |
| Torque | 650 Nm | 410 Nm |
| Engine Bore Size | 83 mm | 85.1 mm |
| Engine Stroke Size | 95.5 mm | 93 mm |
| Engine Compression Ratio | 16.5:1 | 11.0:1 |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 4 doors | 4 doors |
| Vehicle Weight | 1945 kg | 1735 kg |
| Vehicle Length | 5070 mm | 4550 mm |
| Vehicle Width | 1900 mm | 1770 mm |
| Vehicle Height | 1450 mm | 1430 mm |
| Wheelbase Size | 2950 mm | 2660 mm |
| Fuel Consumption Overall | 9.4 L/100km | 13.8 L/100km |
| Fuel Tank Capacity | 90 L | 63 L |
