2006 Kia Optima vs. 2009 Lexus RX
To start off, 2009 Lexus RX is newer by 3 year(s). Which means there will be less support and parts availability for 2006 Kia Optima. In addition, the cost of maintenance, including insurance, on 2006 Kia Optima would be higher. At 3,456 cc (6 cylinders), 2009 Lexus RX is equipped with a bigger engine. In terms of performance, 2009 Lexus RX (273 HP @ 6200 RPM) has 135 more horse power than 2006 Kia Optima. (138 HP @ 5500 RPM) In normal driving conditions, 2009 Lexus RX should accelerate faster than 2006 Kia Optima. With that said, vehicle weight also plays an important factor in acceleration. 2006 Kia Optima weights approximately 169 kg more than 2009 Lexus RX.
Because 2009 Lexus RX is four wheel drive (4WD), it will have significant more traction and grip than 2006 Kia Optima. In wet, icy, snow, or gravel driving conditions, 2009 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, 2009 Lexus RX (342 Nm @ 4700 RPM) has 143 more torque (in Nm) than 2006 Kia Optima. (199 Nm @ 3000 RPM). This means 2009 Lexus RX will have an easier job in driving up hills or pulling heavy equipment than 2006 Kia Optima.
Compare all specifications:
| 2006 Kia Optima | 2009 Lexus RX | |
| Make | Kia | Lexus |
| Model | Optima | RX |
| Year Released | 2006 | 2009 |
| 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 | 273 HP |
| Engine RPM | 5500 RPM | 6200 RPM |
| Torque | 199 Nm | 342 Nm |
| Torque RPM | 3000 RPM | 4700 RPM |
| Engine Bore Size | 81 mm | 94 mm |
| Engine Stroke Size | 88 mm | 83 mm |
| 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 | 2004 kg | 1835 kg |
| Vehicle Length | 4730 mm | 4750 mm |
| Vehicle Width | 1820 mm | 1850 mm |
| Vehicle Height | 1420 mm | 1680 mm |
| Wheelbase Size | 2710 mm | 2720 mm |
| Fuel Consumption Overall | 9.4 L/100km | 11.2 L/100km |
| Fuel Tank Capacity | 65 L | 72 L |
