2011 Kia Optima EX vs. 2011 Kia Optima SX
To start off, both 2011 Kia Optima EX and 2011 Kia Optima SX were released in the same year (2011). Therefore the support and the availability on parts for both vehicles should be relatively similar. At 2,400 cc (4 cylinders), 2011 Kia Optima EX is equipped with a bigger engine. In terms of performance, 2011 Kia Optima SX (274 HP @ 6000 RPM) has 74 more horse power than 2011 Kia Optima EX. (200 HP @ 6300 RPM) In normal driving conditions, 2011 Kia Optima SX should accelerate faster than 2011 Kia Optima EX. With that said, vehicle weight also plays an important factor in acceleration. 2011 Kia Optima SX weights approximately 73 kg more than 2011 Kia Optima EX. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Both vehicles are front wheel drive (FWD). Which offers better traction when its slippery than rear 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 Kia Optima SX (364 Nm @ 1750 RPM) has 112 more torque (in Nm) than 2011 Kia Optima EX. (252 Nm @ 4250 RPM). This means 2011 Kia Optima SX will have an easier job in driving up hills or pulling heavy equipment than 2011 Kia Optima EX.
Compare all specifications:
| 2011 Kia Optima EX | 2011 Kia Optima SX | |
| Make | Kia | Kia |
| Model | Optima | Optima |
| Year Released | 2011 | 2011 |
| Body Type | Sedan | Sedan |
| Engine Position | Front | Front |
| Engine Size | 2400 cc | 2000 cc |
| Engine Cylinders | 4 cylinders | 4 cylinders |
| Engine Type | in-line | in-line |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 200 HP | 274 HP |
| Engine RPM | 6300 RPM | 6000 RPM |
| Torque | 252 Nm | 364 Nm |
| Torque RPM | 4250 RPM | 1750 RPM |
| Fuel Type | Gasoline | Gasoline |
| Drive Type | Front | Front |
| Transmission Type | Automatic | Automatic |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 4 doors | 4 doors |
| Vehicle Weight | 1462 kg | 1535 kg |
| Vehicle Length | 4844 mm | 4844 mm |
| Vehicle Width | 1831 mm | 1831 mm |
| Vehicle Height | 1455 mm | 1455 mm |
| Wheelbase Size | 2797 mm | 2797 mm |
| Fuel Consumption | 6.9 L/100km | 6.9 L/100km |
| Fuel Consumption City | 9.8 L/100km | 10.7 L/100km |
| Fuel Tank Capacity | 70 L | 70 L |
