1999 Audi A4 vs. 2006 Audi RS4
To start off, 2006 Audi RS4 is newer by 7 year(s). Which means there will be less support and parts availability for 1999 Audi A4. In addition, the cost of maintenance, including insurance, on 1999 Audi A4 would be higher. At 4,163 cc (8 cylinders), 2006 Audi RS4 is equipped with a bigger engine. In terms of performance, 2006 Audi RS4 (415 HP @ 7800 RPM) has 167 more horse power than 1999 Audi A4. (248 HP @ 4150 RPM) In normal driving conditions, 2006 Audi RS4 should accelerate faster than 1999 Audi A4. With that said, vehicle weight also plays an important factor in acceleration. 2006 Audi RS4 weights approximately 415 kg more than 1999 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, 2006 Audi RS4 (430 Nm @ 5500 RPM) has 91 more torque (in Nm) than 1999 Audi A4. (339 Nm @ 1900 RPM). This means 2006 Audi RS4 will have an easier job in driving up hills or pulling heavy equipment than 1999 Audi A4.
Compare all specifications:
| 1999 Audi A4 | 2006 Audi RS4 | |
| Make | Audi | Audi |
| Model | A4 | RS4 |
| Year Released | 1999 | 2006 |
| Body Type | Station Wagon | Convertible |
| Engine Position | Front | Front |
| Engine Size | 1896 cc | 4163 cc |
| Engine Cylinders | 4 cylinders | 8 cylinders |
| Engine Type | in-line | V |
| Horse Power | 248 HP | 415 HP |
| Engine RPM | 4150 RPM | 7800 RPM |
| Torque | 339 Nm | 430 Nm |
| Torque RPM | 1900 RPM | 5500 RPM |
| Engine Bore Size | 79.5 mm | 84.5 mm |
| Engine Stroke Size | 95.5 mm | 92.8 mm |
| Engine Compression Ratio | 19.5:1 | 12.5:1 |
| Fuel Type | Diesel | Gasoline - Premium |
| Top Speed | 190 km/hour | 250 km/hour |
| Acceleration 0-100mph | 11.9 seconds | 4.9 seconds |
| Drive Type | 4WD | 4WD |
| Transmission Type | Manual | Manual |
| Number of Seats | 5 seats | 4 seats |
| Number of Doors | 5 doors | 2 doors |
| Vehicle Weight | 1430 kg | 1845 kg |
| Vehicle Length | 4480 mm | 4560 mm |
| Vehicle Width | 1740 mm | 1820 mm |
| Vehicle Height | 1420 mm | 1400 mm |
| Wheelbase Size | 2610 mm | 2660 mm |
| Fuel Tank Capacity | 60 L | 63 L |
