2009 Audi Q7 vs. 2005 Mercedes-Benz SL
To start off, 2009 Audi Q7 is newer by 4 year(s). Which means there will be less support and parts availability for 2005 Mercedes-Benz SL. In addition, the cost of maintenance, including insurance, on 2005 Mercedes-Benz SL would be higher. At 4,966 cc (8 cylinders), 2005 Mercedes-Benz SL is equipped with a bigger engine. In terms of performance, 2005 Mercedes-Benz SL (302 HP @ 5600 RPM) has 65 more horse power than 2009 Audi Q7. (237 HP @ 4000 RPM) In normal driving conditions, 2005 Mercedes-Benz SL should accelerate faster than 2009 Audi Q7. With that said, vehicle weight also plays an important factor in acceleration. 2009 Audi Q7 weights approximately 525 kg more than 2005 Mercedes-Benz SL.
Because 2009 Audi Q7 is four wheel drive (4WD), it will have significant more traction and grip than 2005 Mercedes-Benz SL. In wet, icy, snow, or gravel driving conditions, 2009 Audi Q7 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 Q7 (550 Nm @ 2000 RPM) has 89 more torque (in Nm) than 2005 Mercedes-Benz SL. (461 Nm @ 2700 RPM). This means 2009 Audi Q7 will have an easier job in driving up hills or pulling heavy equipment than 2005 Mercedes-Benz SL.
Compare all specifications:
| 2009 Audi Q7 | 2005 Mercedes-Benz SL | |
| Make | Audi | Mercedes-Benz |
| Model | Q7 | SL |
| Year Released | 2009 | 2005 |
| Body Type | SUV | Convertible |
| Engine Position | Front | Front |
| Engine Size | 2967 cc | 4966 cc |
| Engine Cylinders | 6 cylinders | 8 cylinders |
| Engine Type | V | V |
| Valves per Cylinder | 4 valves | 3 valves |
| Horse Power | 237 HP | 302 HP |
| Engine RPM | 4000 RPM | 5600 RPM |
| Torque | 550 Nm | 461 Nm |
| Torque RPM | 2000 RPM | 2700 RPM |
| Engine Bore Size | 83.1 mm | 97 mm |
| Engine Stroke Size | 91.4 mm | 84 mm |
| Fuel Type | Diesel | Gasoline - Premium |
| Acceleration 0-100mph | 8.5 seconds | 6.3 seconds |
| Drive Type | 4WD | Rear |
| Transmission Type | Automatic | Automatic |
| Number of Doors | 5 doors | 2 doors |
| Vehicle Weight | 2370 kg | 1845 kg |
| Vehicle Length | 5090 mm | 4540 mm |
| Vehicle Width | 1990 mm | 1830 mm |
| Vehicle Height | 1740 mm | 1300 mm |
| Wheelbase Size | 3010 mm | 2570 mm |
| Fuel Consumption Overall | 9.8 L/100km | 12.8 L/100km |
| Fuel Tank Capacity | 100 L | 80 L |
