2009 Audi A4 vs. 2005 Mercedes-Benz SL
To start off, 2009 Audi A4 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 @ 4200 RPM) has 80 more horse power than 2009 Audi A4. (222 HP @ 4000 RPM) In normal driving conditions, 2005 Mercedes-Benz SL should accelerate faster than 2009 Audi A4. With that said, vehicle weight also plays an important factor in acceleration. 2005 Mercedes-Benz SL weights approximately 234 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.
Because 2009 Audi A4 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 A4 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, 2005 Mercedes-Benz SL (470 Nm) has 20 more torque (in Nm) than 2009 Audi A4. (450 Nm). This means 2005 Mercedes-Benz SL will have an easier job in driving up hills or pulling heavy equipment than 2009 Audi A4.
Compare all specifications:
| 2009 Audi A4 | 2005 Mercedes-Benz SL | |
| Make | Audi | Mercedes-Benz |
| Model | A4 | SL |
| Year Released | 2009 | 2005 |
| Body Type | Sedan | Convertible |
| Engine Position | Front | Front |
| Engine Size | 2965 cc | 4966 cc |
| Engine Cylinders | 6 cylinders | 8 cylinders |
| Engine Type | V | V |
| Valves per Cylinder | 4 valves | 3 valves |
| Horse Power | 222 HP | 302 HP |
| Engine RPM | 4000 RPM | 4200 RPM |
| Torque | 450 Nm | 470 Nm |
| Engine Bore Size | 83 mm | 97 mm |
| Engine Stroke Size | 91.4 mm | 84 mm |
| Engine Compression Ratio | 17.0:1 | 10.0:1 |
| Drive Type | 4WD | Rear |
| Number of Seats | 5 seats | 2 seats |
| Number of Doors | 4 doors | 2 doors |
| Vehicle Weight | 1610 kg | 1844 kg |
| Vehicle Length | 4550 mm | 4540 mm |
| Vehicle Width | 1780 mm | 1820 mm |
| Vehicle Height | 1430 mm | 1300 mm |
| Wheelbase Size | 2660 mm | 2570 mm |
| Fuel Consumption Overall | 7.6 L/100km | 13.1 L/100km |
| Fuel Tank Capacity | 70 L | 80 L |
