2009 Audi R8 vs. 2007 Mercedes-Benz SLK
To start off, 2009 Audi R8 is newer by 2 year(s). Which means there will be less support and parts availability for 2007 Mercedes-Benz SLK. In addition, the cost of maintenance, including insurance, on 2007 Mercedes-Benz SLK 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 151 more horse power than 2007 Mercedes-Benz SLK. (269 HP @ 6000 RPM). In normal driving conditions, 2009 Audi R8 should accelerate faster than 2007 Mercedes-Benz SLK. With that said, vehicle weight also plays an important factor in acceleration. 2007 Mercedes-Benz SLK weights approximately 1310 kg more than 2009 Audi R8.
Because 2009 Audi R8 is all wheel drive (AWD), it will have significant more traction and grip than 2007 Mercedes-Benz SLK. 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 (430 Nm @ 4500 RPM) has 80 more torque (in Nm) than 2007 Mercedes-Benz SLK. (350 Nm @ 2400 RPM). This means 2009 Audi R8 will have an easier job in driving up hills or pulling heavy equipment than 2007 Mercedes-Benz SLK.
Compare all specifications:
| 2009 Audi R8 | 2007 Mercedes-Benz SLK | |
| Make | Audi | Mercedes-Benz |
| Model | R8 | SLK |
| Year Released | 2009 | 2007 |
| Body Type | Coupe | Convertible |
| Engine Position | Middle | Front |
| Engine Size | 4163 cc | 3498 cc |
| Engine Cylinders | 8 cylinders | 6 cylinders |
| Engine Type | V | V |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 420 HP | 269 HP |
| Engine RPM | 7800 RPM | 6000 RPM |
| Torque | 430 Nm | 350 Nm |
| Torque RPM | 4500 RPM | 2400 RPM |
| Engine Compression Ratio | 12.5:1 | 11.0:1 |
| Fuel Type | Gasoline | Gasoline - Premium |
| Drive Type | AWD | Rear |
| Transmission Type | Manual | Manual |
| Number of Seats | 2 seats | 2 seats |
| Number of Doors | 2 doors | 2 doors |
| Vehicle Weight | 895 kg | 2205 kg |
| Vehicle Length | 4440 mm | 4090 mm |
| Vehicle Width | 1910 mm | 1790 mm |
| Vehicle Height | 1260 mm | 1300 mm |
| Wheelbase Size | 2660 mm | 2410 mm |
| Fuel Consumption Highway | 12.4 L/100km | 9.4 L/100km |
| Fuel Consumption Overall | 15.7 L/100km | 10.6 L/100km |
| Fuel Tank Capacity | 90 L | 70 L |
