2009 Audi S4 vs. 2008 Mercedes-Benz SL
To start off, 2009 Audi S4 is newer by 1 year(s). Which means there will be less support and parts availability for 2008 Mercedes-Benz SL. In addition, the cost of maintenance, including insurance, on 2008 Mercedes-Benz SL would be higher. At 5,439 cc (8 cylinders), 2008 Mercedes-Benz SL is equipped with a bigger engine. In terms of performance, 2008 Mercedes-Benz SL (510 HP @ 6100 RPM) has 170 more horse power than 2009 Audi S4. (340 HP @ 6800 RPM) In normal driving conditions, 2008 Mercedes-Benz SL should accelerate faster than 2009 Audi S4. With that said, vehicle weight also plays an important factor in acceleration. 2008 Mercedes-Benz SL weights approximately 1025 kg more than 2009 Audi S4. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 2009 Audi S4 is four wheel drive (4WD), it will have significant more traction and grip than 2008 Mercedes-Benz SL. In wet, icy, snow, or gravel driving conditions, 2009 Audi S4 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, 2008 Mercedes-Benz SL (720 Nm @ 2600 RPM) has 310 more torque (in Nm) than 2009 Audi S4. (410 Nm @ 3500 RPM). This means 2008 Mercedes-Benz SL will have an easier job in driving up hills or pulling heavy equipment than 2009 Audi S4.
Compare all specifications:
| 2009 Audi S4 | 2008 Mercedes-Benz SL | |
| Make | Audi | Mercedes-Benz |
| Model | S4 | SL |
| Year Released | 2009 | 2008 |
| Body Type | Convertible | Convertible |
| Engine Position | Front | Front |
| Engine Size | 4161 cc | 5439 cc |
| Engine Cylinders | 8 cylinders | 8 cylinders |
| Engine Type | V | V |
| Valves per Cylinder | 5 valves | 3 valves |
| Horse Power | 340 HP | 510 HP |
| Engine RPM | 6800 RPM | 6100 RPM |
| Torque | 410 Nm | 720 Nm |
| Torque RPM | 3500 RPM | 2600 RPM |
| Engine Bore Size | 84.5 mm | 97 mm |
| Engine Stroke Size | 92.8 mm | 92 mm |
| Fuel Type | Gasoline | Gasoline |
| Drive Type | 4WD | Rear |
| Transmission Type | Automatic | Automatic |
| Number of Seats | 4 seats | 2 seats |
| Number of Doors | 2 doors | 2 doors |
| Vehicle Weight | 930 kg | 1955 kg |
| Vehicle Length | 4580 mm | 4540 mm |
| Vehicle Width | 1780 mm | 1820 mm |
| Vehicle Height | 1400 mm | 1300 mm |
| Wheelbase Size | 2660 mm | 2570 mm |
| Fuel Consumption | 11.2 L/100km | 11.9 L/100km |
| Fuel Consumption City | 16.8 L/100km | 17 L/100km |
| Fuel Consumption Overall | 14.7 L/100km | 14.6 L/100km |
| Fuel Tank Capacity | 63 L | 80 L |
