2005 Kia Optima vs. 2010 Infiniti EX
To start off, 2010 Infiniti EX is newer by 5 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 3,498 cc (6 cylinders), 2010 Infiniti EX is equipped with a bigger engine. In terms of performance, 2010 Infiniti EX (293 HP @ 6800 RPM) has 123 more horse power than 2005 Kia Optima. (170 HP @ 4000 RPM) In normal driving conditions, 2010 Infiniti EX should accelerate faster than 2005 Kia Optima. With that said, vehicle weight also plays an important factor in acceleration. 2010 Infiniti EX weights approximately 232 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 2010 Infiniti EX is four wheel drive (4WD), it will have significant more traction and grip than 2005 Kia Optima. In wet, icy, snow, or gravel driving conditions, 2010 Infiniti EX will offer significantly more control. 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, 2010 Infiniti EX (343 Nm) has 102 more torque (in Nm) than 2005 Kia Optima. (241 Nm). This means 2010 Infiniti EX will have an easier job in driving up hills or pulling heavy equipment than 2005 Kia Optima.
Compare all specifications:
| 2005 Kia Optima | 2010 Infiniti EX | |
| Make | Kia | Infiniti |
| Model | Optima | EX |
| Year Released | 2005 | 2010 |
| Body Type | Sedan | SUV |
| Engine Position | Front | Front |
| Engine Size | 2671 cc | 3498 cc |
| Engine Cylinders | 6 cylinders | 6 cylinders |
| Engine Type | V | V |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 170 HP | 293 HP |
| Engine RPM | 4000 RPM | 6800 RPM |
| Torque | 241 Nm | 343 Nm |
| Engine Compression Ratio | 10.0:1 | 10.3:1 |
| Drive Type | Front | 4WD |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 4 doors | 5 doors |
| Vehicle Weight | 1487 kg | 1719 kg |
| Vehicle Length | 4730 mm | 4640 mm |
| Vehicle Width | 1820 mm | 1810 mm |
| Vehicle Height | 1420 mm | 1600 mm |
| Wheelbase Size | 2710 mm | 2810 mm |
| Fuel Consumption Overall | 10.4 L/100km | 11.5 L/100km |
| Fuel Tank Capacity | 65 L | 82 L |
