2005 Kia Optima vs. 2007 Lexus RX
To start off, 2007 Lexus RX is newer by 2 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 3,456 cc (6 cylinders), 2007 Lexus RX is equipped with a bigger engine. In terms of performance, 2007 Lexus RX (272 HP @ 6200 RPM) has 134 more horse power than 2005 Kia Optima. (138 HP @ 3800 RPM) In normal driving conditions, 2007 Lexus RX should accelerate faster than 2005 Kia Optima. With that said, vehicle weight also plays an important factor in acceleration. 2007 Lexus RX weights approximately 422 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 2007 Lexus RX 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, 2007 Lexus RX 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, 2007 Lexus RX (342 Nm) has 143 more torque (in Nm) than 2005 Kia Optima. (199 Nm). This means 2007 Lexus RX will have an easier job in driving up hills or pulling heavy equipment than 2005 Kia Optima.
Compare all specifications:
| 2005 Kia Optima | 2007 Lexus RX | |
| Make | Kia | Lexus |
| Model | Optima | RX |
| Year Released | 2005 | 2007 |
| Body Type | Sedan | SUV |
| Engine Position | Front | Front |
| Engine Size | 2360 cc | 3456 cc |
| Engine Cylinders | 4 cylinders | 6 cylinders |
| Engine Type | in-line | V |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 138 HP | 272 HP |
| Engine RPM | 3800 RPM | 6200 RPM |
| Torque | 199 Nm | 342 Nm |
| Engine Compression Ratio | 10.0:1 | 10.8:1 |
| Drive Type | Front | 4WD |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 4 doors | 5 doors |
| Vehicle Weight | 1488 kg | 1910 kg |
| Vehicle Length | 4730 mm | 4580 mm |
| Vehicle Width | 1820 mm | 1850 mm |
| Vehicle Height | 1420 mm | 1680 mm |
| Wheelbase Size | 2710 mm | 2730 mm |
| Fuel Consumption Overall | 9.4 L/100km | 11.2 L/100km |
| Fuel Tank Capacity | 65 L | 75 L |
