2009 BMW X5 vs. 2005 Mercedes-Benz SL
To start off, 2009 BMW X5 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 20 more horse power than 2009 BMW X5. (282 HP @ 4400 RPM) In normal driving conditions, 2005 Mercedes-Benz SL should accelerate faster than 2009 BMW X5. With that said, vehicle weight also plays an important factor in acceleration. 2009 BMW X5 weights approximately 306 kg more than 2005 Mercedes-Benz SL.
Because 2009 BMW X5 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 BMW X5 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 BMW X5 (580 Nm) has 110 more torque (in Nm) than 2005 Mercedes-Benz SL. (470 Nm). This means 2009 BMW X5 will have an easier job in driving up hills or pulling heavy equipment than 2005 Mercedes-Benz SL.
Compare all specifications:
| 2009 BMW X5 | 2005 Mercedes-Benz SL | |
| Make | BMW | Mercedes-Benz |
| Model | X5 | SL |
| Year Released | 2009 | 2005 |
| Body Type | SUV | Convertible |
| Engine Position | Front | Front |
| Engine Size | 2993 cc | 4966 cc |
| Engine Cylinders | 6 cylinders | 8 cylinders |
| Engine Type | in-line | V |
| Valves per Cylinder | 4 valves | 3 valves |
| Horse Power | 282 HP | 302 HP |
| Engine RPM | 4400 RPM | 4200 RPM |
| Torque | 580 Nm | 470 Nm |
| Engine Bore Size | 84 mm | 97 mm |
| Engine Stroke Size | 90 mm | 84 mm |
| Engine Compression Ratio | 17.5:1 | 10.0:1 |
| Drive Type | 4WD | Rear |
| Number of Seats | 5 seats | 2 seats |
| Number of Doors | 5 doors | 2 doors |
| Vehicle Weight | 2150 kg | 1844 kg |
| Vehicle Length | 4860 mm | 4540 mm |
| Vehicle Width | 1940 mm | 1820 mm |
| Vehicle Height | 1740 mm | 1300 mm |
| Wheelbase Size | 2940 mm | 2570 mm |
| Fuel Consumption Overall | 8.2 L/100km | 13.1 L/100km |
| Fuel Tank Capacity | 85 L | 80 L |
