2003 Audi A6 vs. 2005 Audi S4
To start off, 2005 Audi S4 is newer by 2 year(s). Which means there will be less support and parts availability for 2003 Audi A6. In addition, the cost of maintenance, including insurance, on 2003 Audi A6 would be higher. At 4,163 cc (8 cylinders), 2005 Audi S4 is equipped with a bigger engine. In terms of performance, 2005 Audi S4 (339 HP @ 7000 RPM) has 161 more horse power than 2003 Audi A6. (178 HP @ 3300 RPM) In normal driving conditions, 2005 Audi S4 should accelerate faster than 2003 Audi A6. With that said, vehicle weight also plays an important factor in acceleration. 2005 Audi S4 weights approximately 100 kg more than 2003 Audi A6. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 2005 Audi S4 is four wheel drive (4WD), it will have significant more traction and grip than 2003 Audi A6. In wet, icy, snow, or gravel driving conditions, 2005 Audi S4 will offer significantly more control. 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, 2005 Audi S4 (410 Nm @ 3500 RPM) has 40 more torque (in Nm) than 2003 Audi A6. (370 Nm @ 1400 RPM). This means 2005 Audi S4 will have an easier job in driving up hills or pulling heavy equipment than 2003 Audi A6.
Compare all specifications:
| 2003 Audi A6 | 2005 Audi S4 | |
| Make | Audi | Audi |
| Model | A6 | S4 |
| Year Released | 2003 | 2005 |
| Body Type | Station Wagon | Station Wagon |
| Engine Position | Front | Front |
| Engine Size | 2698 cc | 4163 cc |
| Engine Cylinders | 6 cylinders | 8 cylinders |
| Engine Type | V | V |
| Valves per Cylinder | 4 valves | 5 valves |
| Horse Power | 178 HP | 339 HP |
| Engine RPM | 3300 RPM | 7000 RPM |
| Torque | 370 Nm | 410 Nm |
| Torque RPM | 1400 RPM | 3500 RPM |
| Engine Bore Size | 83.1 mm | 84.6 mm |
| Engine Stroke Size | 83.1 mm | 92.8 mm |
| Engine Compression Ratio | 17.0:1 | 11.0:1 |
| Fuel Type | Diesel | Gasoline - Premium |
| Drive Type | Front | 4WD |
| Transmission Type | Manual | Manual |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 5 doors | 5 doors |
| Vehicle Weight | 1695 kg | 1795 kg |
| Vehicle Length | 4940 mm | 4580 mm |
| Vehicle Width | 1860 mm | 1790 mm |
| Vehicle Height | 1470 mm | 1450 mm |
| Wheelbase Size | 2850 mm | 2660 mm |
| Fuel Consumption Overall | 7.1 L/100km | 13.4 L/100km |
| Fuel Tank Capacity | 70 L | 66 L |
