2009 Audi A4 vs. 2011 Audi R8
To start off, 2011 Audi R8 is newer by 2 year(s). Which means there will be less support and parts availability for 2009 Audi A4. In addition, the cost of maintenance, including insurance, on 2009 Audi A4 would be higher. At 4,200 cc (8 cylinders), 2011 Audi R8 is equipped with a bigger engine. In terms of performance, 2011 Audi R8 (420 HP @ 7800 RPM) has 209 more horse power than 2009 Audi A4. (211 HP @ 4300 RPM) In normal driving conditions, 2011 Audi R8 should accelerate faster than 2009 Audi A4. With that said, vehicle weight also plays an important factor in acceleration. 2011 Audi R8 weights approximately 603 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.
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, 2011 Audi R8 (430 Nm @ 4500 RPM) has 80 more torque (in Nm) than 2009 Audi A4. (350 Nm @ 1500 RPM). This means 2011 Audi R8 will have an easier job in driving up hills or pulling heavy equipment than 2009 Audi A4. 2009 Audi A4 has automatic transmission and 2011 Audi R8 has manual transmission. 2011 Audi R8 will offer better control over acceleration and deceleration in addition to better fuel efficiency overall. 2009 Audi A4 will be easier to drive especially in heavy traffic.
Compare all specifications:
| 2009 Audi A4 | 2011 Audi R8 | |
| Make | Audi | Audi |
| Model | A4 | R8 |
| Year Released | 2009 | 2011 |
| Body Type | Sedan | Coupe |
| Engine Position | Front | Middle |
| Engine Size | 1984 cc | 4200 cc |
| Engine Cylinders | 4 cylinders | 8 cylinders |
| Engine Type | in-line | V |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 211 HP | 420 HP |
| Engine RPM | 4300 RPM | 7800 RPM |
| Torque | 350 Nm | 430 Nm |
| Torque RPM | 1500 RPM | 4500 RPM |
| Fuel Type | Gasoline | Gasoline - Premium |
| Drive Type | 4WD | AWD |
| Transmission Type | Automatic | Manual |
| Number of Seats | 5 seats | 2 seats |
| Number of Doors | 4 doors | 2 doors |
| Vehicle Weight | 1032 kg | 1635 kg |
| Vehicle Length | 4710 mm | 4435 mm |
| Vehicle Width | 1840 mm | 1930 mm |
| Vehicle Height | 1430 mm | 1252 mm |
| Wheelbase Size | 2820 mm | 2649 mm |
| Fuel Consumption | 7.8 L/100km | 11.8 L/100km |
| Fuel Consumption City | 10.2 L/100km | 21.4 L/100km |
| Fuel Tank Capacity | 70 L | 90 L |
