2005 Audi A4 vs. 2004 Audi S4
To start off, 2005 Audi A4 is newer by 1 year(s). Which means there will be less support and parts availability for 2004 Audi S4. In addition, the cost of maintenance, including insurance, on 2004 Audi S4 would be higher. At 4,162 cc (8 cylinders), 2004 Audi S4 is equipped with a bigger engine. In terms of performance, 2004 Audi S4 (339 HP @ 7000 RPM) has 119 more horse power than 2005 Audi A4. (220 HP @ 6300 RPM) In normal driving conditions, 2004 Audi S4 should accelerate faster than 2005 Audi A4. With that said, vehicle weight also plays an important factor in acceleration. 2004 Audi S4 weights approximately 120 kg more than 2005 Audi A4. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
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, 2004 Audi S4 (410 Nm @ 3500 RPM) has 110 more torque (in Nm) than 2005 Audi A4. (300 Nm @ 3200 RPM). This means 2004 Audi S4 will have an easier job in driving up hills or pulling heavy equipment than 2005 Audi A4.
Compare all specifications:
| 2005 Audi A4 | 2004 Audi S4 | |
| Make | Audi | Audi |
| Model | A4 | S4 |
| Year Released | 2005 | 2004 |
| Body Type | Sedan | Sedan |
| Engine Position | Front | Front |
| Engine Size | 2983 cc | 4162 cc |
| Engine Cylinders | 6 cylinders | 8 cylinders |
| Engine Type | V | V |
| Valves per Cylinder | 5 valves | 5 valves |
| Horse Power | 220 HP | 339 HP |
| Engine RPM | 6300 RPM | 7000 RPM |
| Torque | 300 Nm | 410 Nm |
| Torque RPM | 3200 RPM | 3500 RPM |
| Engine Bore Size | 83 mm | 84.5 mm |
| Engine Stroke Size | 93 mm | 92.8 mm |
| Engine Compression Ratio | 10.1:1 | 11.0:1 |
| Top Speed | 238 km/hour | 250 km/hour |
| Drive Type | 4WD | 4WD |
| Transmission Type | Automatic | Automatic |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 4 doors | 4 doors |
| Vehicle Weight | 1645 kg | 1765 kg |
| Vehicle Length | 4550 mm | 4590 mm |
| Vehicle Width | 1770 mm | 1780 mm |
| Vehicle Height | 1430 mm | 1430 mm |
| Wheelbase Size | 2660 mm | 2470 mm |
| Fuel Consumption Highway | 9.6 L/100km | 9.1 L/100km |
| Fuel Consumption City | 13.2 L/100km | 17.9 L/100km |
| Fuel Consumption Overall | 11 L/100km | 12.3 L/100km |
| Fuel Tank Capacity | 66 L | 63 L |
