2004 Audi A4 vs. 2009 Audi R8
To start off, 2009 Audi R8 is newer by 5 year(s). Which means there will be less support and parts availability for 2004 Audi A4. In addition, the cost of maintenance, including insurance, on 2004 Audi A4 would be higher. At 5,204 cc (10 cylinders), 2009 Audi R8 is equipped with a bigger engine. In terms of performance, 2009 Audi R8 (518 HP @ 8000 RPM) has 418 more horse power than 2004 Audi A4. (100 HP @ 5700 RPM) In normal driving conditions, 2009 Audi R8 should accelerate faster than 2004 Audi A4. With that said, vehicle weight also plays an important factor in acceleration. 2009 Audi R8 weights approximately 315 kg more than 2004 Audi A4. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 2009 Audi R8 is all wheel drive (AWD), it will have significant more traction and grip than 2004 Audi A4. In wet, icy, snow, or gravel driving conditions, 2009 Audi R8 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, 2009 Audi R8 (530 Nm @ 6500 RPM) has 382 more torque (in Nm) than 2004 Audi A4. (148 Nm @ 3800 RPM). This means 2009 Audi R8 will have an easier job in driving up hills or pulling heavy equipment than 2004 Audi A4.
Compare all specifications:
| 2004 Audi A4 | 2009 Audi R8 | |
| Make | Audi | Audi |
| Model | A4 | R8 |
| Year Released | 2004 | 2009 |
| Body Type | Sedan | Coupe |
| Engine Position | Front | Middle |
| Engine Size | 1595 cc | 5204 cc |
| Engine Cylinders | 4 cylinders | 10 cylinders |
| Engine Type | in-line | V |
| Valves per Cylinder | 2 valves | 4 valves |
| Horse Power | 100 HP | 518 HP |
| Engine RPM | 5700 RPM | 8000 RPM |
| Torque | 148 Nm | 530 Nm |
| Torque RPM | 3800 RPM | 6500 RPM |
| Engine Compression Ratio | 10.5:1 | 12.5:1 |
| Fuel Type | Gasoline | Gasoline - Premium |
| Acceleration 0-100mph | 13.2 seconds | 3.9 seconds |
| Drive Type | Front | AWD |
| Transmission Type | Manual | Manual |
| Number of Seats | 5 seats | 2 seats |
| Number of Doors | 4 doors | 2 doors |
| Vehicle Weight | 1265 kg | 1580 kg |
| Vehicle Length | 4590 mm | 4440 mm |
| Vehicle Width | 1770 mm | 1940 mm |
| Vehicle Height | 1430 mm | 1260 mm |
| Wheelbase Size | 2660 mm | 2660 mm |
| Fuel Consumption City | 10.9 L/100km | 19.6 L/100km |
| Fuel Consumption Overall | 8.1 L/100km | 14.7 L/100km |
| Fuel Tank Capacity | 70 L | 75 L |
