2005 Kia Optima vs. 2010 Infiniti FX
To start off, 2010 Infiniti FX 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 5,019 cc (8 cylinders), 2010 Infiniti FX is equipped with a bigger engine. In terms of performance, 2010 Infiniti FX (390 HP @ 6500 RPM) has 252 more horse power than 2005 Kia Optima. (138 HP @ 4000 RPM) In normal driving conditions, 2010 Infiniti FX should accelerate faster than 2005 Kia Optima.
Because 2010 Infiniti FX 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 FX 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 FX (501 Nm) has 302 more torque (in Nm) than 2005 Kia Optima. (199 Nm). This means 2010 Infiniti FX 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 FX | |
| Make | Kia | Infiniti |
| Model | Optima | FX |
| Year Released | 2005 | 2010 |
| Body Type | Sedan | Crossover |
| Engine Position | Front | Front |
| Engine Size | 2360 cc | 5019 cc |
| Engine Cylinders | 4 cylinders | 8 cylinders |
| Engine Type | in-line | V |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 138 HP | 390 HP |
| Engine RPM | 4000 RPM | 6500 RPM |
| Torque | 199 Nm | 501 Nm |
| Engine Bore Size | 87.1 mm | 95.5 mm |
| Engine Stroke Size | 100 mm | 87.7 mm |
| Drive Type | Front | 4WD |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 4 doors | 5 doors |
| Vehicle Length | 4730 mm | 4870 mm |
| Vehicle Width | 1820 mm | 1930 mm |
| Vehicle Height | 1420 mm | 1690 mm |
| Wheelbase Size | 2620 mm | 2890 mm |
| Fuel Consumption | 7.8 L/100km | 11.8 L/100km |
| Fuel Consumption City | 10.7 L/100km | 16.8 L/100km |
| Fuel Consumption Overall | 9.4 L/100km | 14.7 L/100km |
| Fuel Tank Capacity | 65 L | 90 L |
