2009 Cadillac STS vs. 2011 Mercedes-Benz S
To start off, 2011 Mercedes-Benz S is newer by 2 year(s). Which means there will be less support and parts availability for 2009 Cadillac STS. In addition, the cost of maintenance, including insurance, on 2009 Cadillac STS would be higher. At 5,500 cc (12 cylinders), 2011 Mercedes-Benz S is equipped with a bigger engine. In terms of performance, 2011 Mercedes-Benz S (510 HP @ 5000 RPM) has 190 more horse power than 2009 Cadillac STS. (320 HP @ 6400 RPM) In normal driving conditions, 2011 Mercedes-Benz S should accelerate faster than 2009 Cadillac STS. With that said, vehicle weight also plays an important factor in acceleration. 2011 Mercedes-Benz S weights approximately 610 kg more than 2009 Cadillac STS. 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, 2011 Mercedes-Benz S (829 Nm @ 1800 RPM) has 402 more torque (in Nm) than 2009 Cadillac STS. (427 Nm @ 4400 RPM). This means 2011 Mercedes-Benz S will have an easier job in driving up hills or pulling heavy equipment than 2009 Cadillac STS.
Compare all specifications:
| 2009 Cadillac STS | 2011 Mercedes-Benz S | |
| Make | Cadillac | Mercedes-Benz |
| Model | STS | S |
| Year Released | 2009 | 2011 |
| Body Type | Sedan | Sedan |
| Engine Position | Front | Front |
| Engine Size | 4564 cc | 5500 cc |
| Engine Cylinders | 8 cylinders | 12 cylinders |
| Engine Type | V | V |
| Valves per Cylinder | 4 valves | 3 valves |
| Horse Power | 320 HP | 510 HP |
| Engine RPM | 6400 RPM | 5000 RPM |
| Torque | 427 Nm | 829 Nm |
| Torque RPM | 4400 RPM | 1800 RPM |
| Fuel Type | Gasoline | Gasoline |
| Drive Type | Rear | Rear |
| Transmission Type | Automatic | Automatic |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 4 doors | 4 doors |
| Vehicle Weight | 1635 kg | 2245 kg |
| Vehicle Length | 5000 mm | 5245 mm |
| Vehicle Width | 1850 mm | 1872 mm |
| Vehicle Height | 1470 mm | 1473 mm |
| Wheelbase Size | 2960 mm | 3165 mm |
| Fuel Consumption | 9.8 L/100km | 12.4 L/100km |
| Fuel Consumption City | 15.7 L/100km | 19.6 L/100km |
| Fuel Tank Capacity | 64 L | 90 L |
