2007 Infiniti QX56 vs. 2009 Kia Optima
To start off, 2009 Kia Optima is newer by 2 year(s). Which means there will be less support and parts availability for 2007 Infiniti QX56. In addition, the cost of maintenance, including insurance, on 2007 Infiniti QX56 would be higher. At 5,552 cc (8 cylinders), 2007 Infiniti QX56 is equipped with a bigger engine. In terms of performance, 2007 Infiniti QX56 (320 HP @ 4900 RPM) has 147 more horse power than 2009 Kia Optima. (173 HP @ 6000 RPM). In normal driving conditions, 2007 Infiniti QX56 should accelerate faster than 2009 Kia Optima.
Because 2007 Infiniti QX56 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 Infiniti QX56. However, in wet, icy, snow, or gravel driving conditions, 2009 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 Infiniti QX56 (533 Nm @ 3600 RPM) has 364 more torque (in Nm) than 2009 Kia Optima. (169 Nm @ 4000 RPM). This means 2007 Infiniti QX56 will have an easier job in driving up hills or pulling heavy equipment than 2009 Kia Optima. 2007 Infiniti QX56 has automatic transmission and 2009 Kia Optima has manual transmission. 2009 Kia Optima will offer better control over acceleration and deceleration in addition to better fuel efficiency overall. 2007 Infiniti QX56 will be easier to drive especially in heavy traffic.
Compare all specifications:
| 2007 Infiniti QX56 | 2009 Kia Optima | |
| Make | Infiniti | Kia |
| Model | QX56 | Optima |
| Year Released | 2007 | 2009 |
| Body Type | SUV | Sedan |
| Engine Position | Front | Front |
| Engine Size | 5552 cc | 2399 cc |
| Engine Cylinders | 8 cylinders | 4 cylinders |
| Engine Type | V | in-line |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 320 HP | 173 HP |
| Engine RPM | 4900 RPM | 6000 RPM |
| Torque | 533 Nm | 169 Nm |
| Torque RPM | 3600 RPM | 4000 RPM |
| Fuel Type | Diesel | Gasoline |
| Drive Type | Rear | Front |
| Transmission Type | Automatic | Manual |
| Number of Seats | 7 seats | 5 seats |
| Number of Doors | 5 doors | 4 doors |
| Vehicle Length | 5260 mm | 4810 mm |
| Vehicle Width | 2010 mm | 1810 mm |
| Vehicle Height | 1960 mm | 1490 mm |
| Wheelbase Size | 3140 mm | 2730 mm |
| Fuel Consumption Highway | 13.1 L/100km | 7.4 L/100km |
| Fuel Consumption City | 18.1 L/100km | 10.7 L/100km |
| Fuel Consumption Overall | 15.7 L/100km | 9.4 L/100km |
| Fuel Tank Capacity | 106 L | 62 L |
