2007 Cadillac STS vs. 2009 Mercedes-Benz SL
To start off, 2009 Mercedes-Benz SL is newer by 2 year(s). Which means there will be less support and parts availability for 2007 Cadillac STS. In addition, the cost of maintenance, including insurance, on 2007 Cadillac STS would be higher. At 6,208 cc (8 cylinders), 2009 Mercedes-Benz SL is equipped with a bigger engine. In terms of performance, 2009 Mercedes-Benz SL (518 HP @ 6800 RPM) has 198 more horse power than 2007 Cadillac STS. (320 HP @ 6400 RPM) In normal driving conditions, 2009 Mercedes-Benz SL should accelerate faster than 2007 Cadillac STS. With that said, vehicle weight also plays an important factor in acceleration. 2007 Cadillac STS weights approximately 326 kg more than 2009 Mercedes-Benz SL.
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, 2009 Mercedes-Benz SL (630 Nm @ 5200 RPM) has 203 more torque (in Nm) than 2007 Cadillac STS. (427 Nm @ 4400 RPM). This means 2009 Mercedes-Benz SL will have an easier job in driving up hills or pulling heavy equipment than 2007 Cadillac STS.
Compare all specifications:
| 2007 Cadillac STS | 2009 Mercedes-Benz SL | |
| Make | Cadillac | Mercedes-Benz |
| Model | STS | SL |
| Year Released | 2007 | 2009 |
| Body Type | Sedan | Convertible |
| Engine Position | Front | Front |
| Engine Size | 4565 cc | 6208 cc |
| Engine Cylinders | 8 cylinders | 8 cylinders |
| Engine Type | V | V |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 320 HP | 518 HP |
| Engine RPM | 6400 RPM | 6800 RPM |
| Torque | 427 Nm | 630 Nm |
| Torque RPM | 4400 RPM | 5200 RPM |
| Engine Bore Size | 93 mm | 102.3 mm |
| Engine Stroke Size | 84 mm | 94.6 mm |
| Drive Type | Rear | Rear |
| Transmission Type | Automatic | Automatic |
| Number of Seats | 5 seats | 2 seats |
| Number of Doors | 4 doors | 2 doors |
| Vehicle Weight | 1566 kg | 1240 kg |
| Vehicle Length | 4990 mm | 4540 mm |
| Vehicle Width | 1850 mm | 1480 mm |
| Vehicle Height | 1470 mm | 1600 mm |
| Wheelbase Size | 2960 mm | 2570 mm |
| Fuel Consumption City | 13.8 L/100km | 19.6 L/100km |
| Fuel Consumption Overall | 11.8 L/100km | 16.8 L/100km |
| Fuel Tank Capacity | 64 L | 80 L |
