2005 Kia Optima vs. 2012 Mercedes-Benz CLS
To start off, 2012 Mercedes-Benz CLS is newer by 7 year(s). Which means there will be less support and parts availability for 2005 Kia Optima. In addition, the cost of maintenance, including insurance, on 2005 Kia Optima would be higher. At 5,500 cc (8 cylinders), 2012 Mercedes-Benz CLS is equipped with a bigger engine. In terms of performance, 2012 Mercedes-Benz CLS (518 HP @ 5250 RPM) has 380 more horse power than 2005 Kia Optima. (138 HP @ 4000 RPM) In normal driving conditions, 2012 Mercedes-Benz CLS should accelerate faster than 2005 Kia Optima. With that said, vehicle weight also plays an important factor in acceleration. 2012 Mercedes-Benz CLS weights approximately 443 kg more than 2005 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, 2005 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 (699 Nm) has 500 more torque (in Nm) than 2005 Kia Optima. (199 Nm). This means 2012 Mercedes-Benz CLS will have an easier job in driving up hills or pulling heavy equipment than 2005 Kia Optima.
Compare all specifications:
| 2005 Kia Optima | 2012 Mercedes-Benz CLS | |
| Make | Kia | Mercedes-Benz |
| Model | Optima | CLS |
| Year Released | 2005 | 2012 |
| Body Type | Sedan | Sedan |
| Engine Position | Front | Front |
| Engine Size | 2360 cc | 5500 cc |
| Engine Cylinders | 4 cylinders | 8 cylinders |
| Engine Type | in-line | V |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 138 HP | 518 HP |
| Engine RPM | 4000 RPM | 5250 RPM |
| Torque | 199 Nm | 699 Nm |
| Drive Type | Front | Rear |
| Number of Seats | 5 seats | 4 seats |
| Number of Doors | 4 doors | 4 doors |
| Vehicle Weight | 1497 kg | 1940 kg |
| Vehicle Length | 4730 mm | 4996 mm |
| Vehicle Width | 1820 mm | 1882 mm |
| Vehicle Height | 1420 mm | 1407 mm |
| Wheelbase Size | 2620 mm | 2875 mm |
| Fuel Consumption | 7.8 L/100km | 10.7 L/100km |
| Fuel Consumption City | 10.7 L/100km | 15.7 L/100km |
| Fuel Tank Capacity | 65 L | 80 L |
