2009 BMW Z4 vs. 2005 Mercedes-Benz SL
To start off, 2009 BMW Z4 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 5,506 cc (12 cylinders), 2005 Mercedes-Benz SL is equipped with a bigger engine. In terms of performance, 2005 Mercedes-Benz SL (493 HP @ 4200 RPM) has 317 more horse power than 2009 BMW Z4. (176 HP @ 5800 RPM) In normal driving conditions, 2005 Mercedes-Benz SL should accelerate faster than 2009 BMW Z4. With that said, vehicle weight also plays an important factor in acceleration. 2005 Mercedes-Benz SL weights approximately 664 kg more than 2009 BMW Z4. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Both vehicles are rear wheel drive (RWD) - it offers better handling in dry conditions; in addition, if you are looking to drift, both vehicles do the job better than front wheel drive vehicles. 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 (800 Nm) has 570 more torque (in Nm) than 2009 BMW Z4. (230 Nm). This means 2005 Mercedes-Benz SL will have an easier job in driving up hills or pulling heavy equipment than 2009 BMW Z4.
Compare all specifications:
| 2009 BMW Z4 | 2005 Mercedes-Benz SL | |
| Make | BMW | Mercedes-Benz |
| Model | Z4 | SL |
| Year Released | 2009 | 2005 |
| Body Type | Convertible | Convertible |
| Engine Position | Front | Front |
| Engine Size | 2497 cc | 5506 cc |
| Engine Cylinders | 6 cylinders | 12 cylinders |
| Engine Type | in-line | V |
| Valves per Cylinder | 4 valves | 3 valves |
| Horse Power | 176 HP | 493 HP |
| Engine RPM | 5800 RPM | 4200 RPM |
| Torque | 230 Nm | 800 Nm |
| Engine Bore Size | 82 mm | 82 mm |
| Engine Stroke Size | 78.8 mm | 87 mm |
| Engine Compression Ratio | 11.0:1 | 9.0:1 |
| Drive Type | Rear | Rear |
| Number of Seats | 2 seats | 2 seats |
| Number of Doors | 2 doors | 2 doors |
| Vehicle Weight | 1345 kg | 2009 kg |
| Vehicle Length | 4100 mm | 4540 mm |
| Vehicle Width | 1790 mm | 1820 mm |
| Vehicle Height | 1310 mm | 1300 mm |
| Wheelbase Size | 2500 mm | 2570 mm |
| Fuel Consumption Overall | 8.2 L/100km | 15.7 L/100km |
| Fuel Tank Capacity | 55 L | 80 L |
