2009 Kia Optima vs. 2012 Mercedes-Benz CLS
To start off, 2012 Mercedes-Benz CLS is newer by 3 year(s). Which means there will be less support and parts availability for 2009 Kia Optima. In addition, the cost of maintenance, including insurance, on 2009 Kia Optima would be higher. At 4,663 cc (8 cylinders), 2012 Mercedes-Benz CLS is equipped with a bigger engine. In terms of performance, 2012 Mercedes-Benz CLS (402 HP @ 5000 RPM) has 208 more horse power than 2009 Kia Optima. (194 HP @ 6000 RPM) In normal driving conditions, 2012 Mercedes-Benz CLS should accelerate faster than 2009 Kia Optima. With that said, vehicle weight also plays an important factor in acceleration. 2012 Mercedes-Benz CLS weights approximately 371 kg more than 2009 Kia Optima. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 2012 Mercedes-Benz CLS is rear wheel drive (RWD), it offers better handling in dry conditions; in addition, if you are looking to drift, it will be much easier to do with 2012 Mercedes-Benz CLS. However, in wet, icy, snow, or gravel driving conditions, 2009 Kia Optima, being front wheel drive (FWD), will offer much better control with better grip. 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, 2012 Mercedes-Benz CLS (600 Nm @ 1800 RPM) has 350 more torque (in Nm) than 2009 Kia Optima. (250 Nm @ 4500 RPM). This means 2012 Mercedes-Benz CLS will have an easier job in driving up hills or pulling heavy equipment than 2009 Kia Optima.
Compare all specifications:
| 2009 Kia Optima | 2012 Mercedes-Benz CLS | |
| Make | Kia | Mercedes-Benz |
| Model | Optima | CLS |
| Year Released | 2009 | 2012 |
| Body Type | Sedan | Sedan |
| Engine Position | Front | Front |
| Engine Size | 2656 cc | 4663 cc |
| Engine Cylinders | 6 cylinders | 8 cylinders |
| Engine Type | V | V |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 194 HP | 402 HP |
| Engine RPM | 6000 RPM | 5000 RPM |
| Torque | 250 Nm | 600 Nm |
| Torque RPM | 4500 RPM | 1800 RPM |
| Fuel Type | Gasoline | Gasoline |
| Drive Type | Front | Rear |
| Transmission Type | Automatic | 7-speed shiftable automatic |
| Number of Seats | 5 seats | 4 seats |
| Number of Doors | 4 doors | 4 doors |
| Vehicle Weight | 1519 kg | 1890 kg |
| Vehicle Length | 4810 mm | 4940 mm |
| Vehicle Width | 1810 mm | 1882 mm |
| Vehicle Height | 1490 mm | 1417 mm |
| Wheelbase Size | 2730 mm | 2875 mm |
| Fuel Consumption | 8.6 L/100km | 9.4 L/100km |
| Fuel Consumption City | 11.9 L/100km | 13.8 L/100km |
| Fuel Tank Capacity | 62 L | 80 L |
