2009 Audi A4 vs. 2009 Audi RS4
To start off, both 2009 Audi A4 and 2009 Audi RS4 were released in the same year (2009). Therefore the support and the availability on parts for both vehicles should be relatively similar. At 4,161 cc (8 cylinders), 2009 Audi RS4 is equipped with a bigger engine. In terms of performance, 2009 Audi RS4 (414 HP @ 7800 RPM) has 192 more horse power than 2009 Audi A4. (222 HP @ 4000 RPM) In normal driving conditions, 2009 Audi RS4 should accelerate faster than 2009 Audi A4. With that said, vehicle weight also plays an important factor in acceleration. 2009 Audi RS4 weights approximately 100 kg more than 2009 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, 2009 Audi A4 (450 Nm @ 1400 RPM) has 20 more torque (in Nm) than 2009 Audi RS4. (430 Nm @ 5500 RPM). This means 2009 Audi A4 will have an easier job in driving up hills or pulling heavy equipment than 2009 Audi RS4.
Compare all specifications:
| 2009 Audi A4 | 2009 Audi RS4 | |
| Make | Audi | Audi |
| Model | A4 | RS4 |
| Year Released | 2009 | 2009 |
| Body Type | Sedan | Sedan |
| Engine Position | Front | Front |
| Engine Size | 2965 cc | 4161 cc |
| Engine Cylinders | 6 cylinders | 8 cylinders |
| Engine Type | V | V |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 222 HP | 414 HP |
| Engine RPM | 4000 RPM | 7800 RPM |
| Torque | 450 Nm | 430 Nm |
| Torque RPM | 1400 RPM | 5500 RPM |
| Engine Bore Size | 83 mm | 84.5 mm |
| Engine Stroke Size | 91.4 mm | 92.8 mm |
| Engine Compression Ratio | 17.0:1 | 12.5:1 |
| Fuel Type | Diesel | Gasoline - Premium |
| Top Speed | 235 km/hour | 250 km/hour |
| Acceleration 0-100mph | 7.2 seconds | 4.8 seconds |
| Drive Type | 4WD | 4WD |
| Transmission Type | Manual | Manual |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 4 doors | 5 doors |
| Vehicle Weight | 1610 kg | 1710 kg |
| Vehicle Length | 4550 mm | 4590 mm |
| Vehicle Width | 1780 mm | 1820 mm |
| Vehicle Height | 1430 mm | 1420 mm |
| Wheelbase Size | 2660 mm | 2660 mm |
| Fuel Consumption Overall | 7.6 L/100km | 13.5 L/100km |
| Fuel Tank Capacity | 70 L | 70 L |
