2009 Audi R8 vs. 2004 Audi A4
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 4,163 cc (8 cylinders), 2009 Audi R8 is equipped with a bigger engine. In terms of performance, 2009 Audi R8 (420 HP @ 7800 RPM) has 219 more horse power than 2004 Audi A4. (201 HP @ 3500 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. 2004 Audi A4 weights approximately 715 kg more than 2009 Audi R8.
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 A4 (451 Nm @ 1400 RPM) has 21 more torque (in Nm) than 2009 Audi R8. (430 Nm @ 4500 RPM). This means 2004 Audi A4 will have an easier job in driving up hills or pulling heavy equipment than 2009 Audi R8.
Compare all specifications:
| 2009 Audi R8 | 2004 Audi A4 | |
| Make | Audi | Audi |
| Model | R8 | A4 |
| Year Released | 2009 | 2004 |
| Body Type | Coupe | Sedan |
| Engine Position | Middle | Front |
| Engine Size | 4163 cc | 2967 cc |
| Engine Cylinders | 8 cylinders | 6 cylinders |
| Engine Type | V | V |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 420 HP | 201 HP |
| Engine RPM | 7800 RPM | 3500 RPM |
| Torque | 430 Nm | 451 Nm |
| Torque RPM | 4500 RPM | 1400 RPM |
| Fuel Type | Gasoline | Diesel |
| Drive Type | AWD | 4WD |
| Transmission Type | Manual | Manual |
| Number of Seats | 2 seats | 5 seats |
| Number of Doors | 2 doors | 4 doors |
| Vehicle Weight | 895 kg | 1610 kg |
| Vehicle Length | 4440 mm | 4590 mm |
| Vehicle Width | 1910 mm | 1770 mm |
| Vehicle Height | 1260 mm | 1430 mm |
| Wheelbase Size | 2660 mm | 2430 mm |
| Fuel Consumption Highway | 12.4 L/100km | 5.8 L/100km |
| Fuel Consumption City | 19.6 L/100km | 10.3 L/100km |
| Fuel Consumption Overall | 15.7 L/100km | 7.5 L/100km |
| Fuel Tank Capacity | 90 L | 63 L |
