2005 Audi S4 vs. 2003 Mercedes-Benz SL
To start off, 2005 Audi S4 is newer by 2 year(s). Which means there will be less support and parts availability for 2003 Mercedes-Benz SL. In addition, the cost of maintenance, including insurance, on 2003 Mercedes-Benz SL would be higher. At 4,966 cc (8 cylinders), 2003 Mercedes-Benz SL is equipped with a bigger engine. In terms of performance, 2005 Audi S4 (340 HP @ 4000 RPM) has 38 more horse power than 2003 Mercedes-Benz SL. (302 HP @ 5600 RPM). In normal driving conditions, 2005 Audi S4 should accelerate faster than 2003 Mercedes-Benz SL. With that said, vehicle weight also plays an important factor in acceleration. 2003 Mercedes-Benz SL weights approximately 135 kg more than 2005 Audi S4.
Let's talk about torque, 2003 Mercedes-Benz SL (460 Nm) has 50 more torque (in Nm) than 2005 Audi S4. (410 Nm). This means 2003 Mercedes-Benz SL will have an easier job in driving up hills or pulling heavy equipment than 2005 Audi S4.
Compare all specifications:
| 2005 Audi S4 | 2003 Mercedes-Benz SL | |
| Make | Audi | Mercedes-Benz |
| Model | S4 | SL |
| Year Released | 2005 | 2003 |
| Body Type | Sedan | Convertible |
| Engine Position | Front | Front |
| Engine Size | 4163 cc | 4966 cc |
| Engine Cylinders | 8 cylinders | 8 cylinders |
| Engine Type | V | V |
| Valves per Cylinder | 5 valves | 3 valves |
| Horse Power | 340 HP | 302 HP |
| Engine RPM | 4000 RPM | 5600 RPM |
| Torque | 410 Nm | 460 Nm |
| Engine Bore Size | 85 mm | 97 mm |
| Engine Stroke Size | 93 mm | 84 mm |
| Engine Compression Ratio | 11.0:1 | 10.0:1 |
| Number of Seats | 5 seats | 2 seats |
| Number of Doors | 4 doors | 2 doors |
| Vehicle Weight | 1770 kg | 1905 kg |
| Vehicle Length | 4550 mm | 4540 mm |
| Vehicle Width | 1770 mm | 1830 mm |
| Vehicle Height | 1430 mm | 1300 mm |
| Wheelbase Size | 2770 mm | 2520 mm |
| Fuel Tank Capacity | 66 L | 80 L |
