2005 Kia Optima vs. 2007 Mercedes-Benz CLS
To start off, 2007 Mercedes-Benz CLS is newer by 2 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 6,206 cc (8 cylinders), 2007 Mercedes-Benz CLS is equipped with a bigger engine. In terms of performance, 2007 Mercedes-Benz CLS (507 HP @ 6800 RPM) has 369 more horse power than 2005 Kia Optima. (138 HP @ 4000 RPM) In normal driving conditions, 2007 Mercedes-Benz CLS should accelerate faster than 2005 Kia Optima.
Because 2007 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 2007 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, 2007 Mercedes-Benz CLS (631 Nm) has 432 more torque (in Nm) than 2005 Kia Optima. (199 Nm). This means 2007 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 | 2007 Mercedes-Benz CLS | |
| Make | Kia | Mercedes-Benz |
| Model | Optima | CLS |
| Year Released | 2005 | 2007 |
| Body Type | Sedan | Sedan |
| Engine Position | Front | Front |
| Engine Size | 2360 cc | 6206 cc |
| Engine Cylinders | 4 cylinders | 8 cylinders |
| Engine Type | in-line | V |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 138 HP | 507 HP |
| Engine RPM | 4000 RPM | 6800 RPM |
| Torque | 199 Nm | 631 Nm |
| Engine Bore Size | 87.1 mm | 102.2 mm |
| Engine Stroke Size | 100 mm | 94.6 mm |
| Drive Type | Front | Rear |
| Number of Seats | 5 seats | 4 seats |
| Number of Doors | 4 doors | 4 doors |
| Vehicle Length | 4730 mm | 4910 mm |
| Vehicle Width | 1820 mm | 1880 mm |
| Vehicle Height | 1420 mm | 1400 mm |
| Wheelbase Size | 2620 mm | 2860 mm |
| Fuel Consumption | 7.8 L/100km | 11.8 L/100km |
| Fuel Consumption City | 10.7 L/100km | 18.1 L/100km |
| Fuel Consumption Overall | 9.4 L/100km | 14.7 L/100km |
| Fuel Tank Capacity | 65 L | 80 L |
