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 321 more horse power than 2004 Audi A4. (197 HP @ 5100 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 5 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, 2009 Audi R8 (530 Nm @ 6500 RPM) has 250 more torque (in Nm) than 2004 Audi A4. (280 Nm @ 1800 RPM). This means 2009 Audi R8 will have an easier job in driving up hills or pulling heavy equipment than 2004 Audi A4. 2004 Audi A4 has automatic transmission and 2009 Audi R8 has manual transmission. 2009 Audi R8 will offer better control over acceleration and deceleration in addition to better fuel efficiency overall. 2004 Audi A4 will be easier to drive especially in heavy traffic.
Compare all specifications:
| 2004 Audi A4 | 2009 Audi R8 | |
| Make | Audi | Audi |
| Model | A4 | R8 |
| Year Released | 2004 | 2009 |
| Body Type | Station Wagon | Coupe |
| Engine Position | Front | Middle |
| Engine Size | 1984 cc | 5204 cc |
| Engine Cylinders | 4 cylinders | 10 cylinders |
| Engine Type | in-line | V |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 197 HP | 518 HP |
| Engine RPM | 5100 RPM | 8000 RPM |
| Torque | 280 Nm | 530 Nm |
| Torque RPM | 1800 RPM | 6500 RPM |
| Engine Compression Ratio | 10.5:1 | 12.5:1 |
| Fuel Type | Gasoline - Premium | Gasoline - Premium |
| Top Speed | 230 km/hour | 311 km/hour |
| Acceleration 0-100mph | 8 seconds | 3.9 seconds |
| Drive Type | 4WD | AWD |
| Transmission Type | Automatic | Manual |
| Number of Seats | 5 seats | 2 seats |
| Number of Doors | 5 doors | 2 doors |
| Vehicle Weight | 1585 kg | 1580 kg |
| Vehicle Length | 4590 mm | 4440 mm |
| Vehicle Width | 1780 mm | 1940 mm |
| Vehicle Height | 1430 mm | 1260 mm |
| Wheelbase Size | 2470 mm | 2660 mm |
| Fuel Consumption | 7.3 L/100km | 12.4 L/100km |
| Fuel Consumption City | 13.4 L/100km | 19.6 L/100km |
| Fuel Consumption Overall | 9.5 L/100km | 15.7 L/100km |
| Fuel Tank Capacity | 63 L | 75 L |
