2007 Kia Optima vs. 2012 Infiniti M
To start off, 2012 Infiniti M is newer by 5 year(s). Which means there will be less support and parts availability for 2007 Kia Optima. In addition, the cost of maintenance, including insurance, on 2007 Kia Optima would be higher. At 5,600 cc (8 cylinders), 2012 Infiniti M is equipped with a bigger engine. In terms of performance, 2012 Infiniti M (420 HP @ 6000 RPM) has 235 more horse power than 2007 Kia Optima. (185 HP @ 6000 RPM) In normal driving conditions, 2012 Infiniti M should accelerate faster than 2007 Kia Optima. With that said, vehicle weight also plays an important factor in acceleration. 2012 Infiniti M weights approximately 336 kg more than 2007 Kia Optima. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 2012 Infiniti M 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 2012 Infiniti M. However, in wet, icy, snow, or gravel driving conditions, 2007 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, 2012 Infiniti M (565 Nm @ 4400 RPM) has 318 more torque (in Nm) than 2007 Kia Optima. (247 Nm @ 4000 RPM). This means 2012 Infiniti M will have an easier job in driving up hills or pulling heavy equipment than 2007 Kia Optima.
Compare all specifications:
| 2007 Kia Optima | 2012 Infiniti M | |
| Make | Kia | Infiniti |
| Model | Optima | M |
| Year Released | 2007 | 2012 |
| Body Type | Sedan | Sedan |
| Engine Position | Front | Front |
| Engine Size | 2654 cc | 5600 cc |
| Engine Cylinders | 6 cylinders | 8 cylinders |
| Engine Type | V | V |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 185 HP | 420 HP |
| Engine RPM | 6000 RPM | 6000 RPM |
| Torque | 247 Nm | 565 Nm |
| Torque RPM | 4000 RPM | 4400 RPM |
| Fuel Type | Gasoline - Premium | Gasoline |
| Drive Type | Front | Rear |
| Transmission Type | Automatic | 7-speed shiftable automatic |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 4 doors | 4 doors |
| Vehicle Weight | 1487 kg | 1823 kg |
| Vehicle Length | 4740 mm | 4945 mm |
| Vehicle Width | 1810 mm | 1844 mm |
| Vehicle Height | 1490 mm | 1501 mm |
| Wheelbase Size | 2730 mm | 2901 mm |
| Fuel Consumption | 7.8 L/100km | 9.8 L/100km |
| Fuel Consumption City | 10.7 L/100km | 14.7 L/100km |
| Fuel Tank Capacity | 62 L | 76 L |
