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 3,311 cc (6 cylinders), 2007 Lexus RX is equipped with a bigger engine. In terms of performance, 2007 Lexus RX (268 HP @ 5600 RPM) has 98 more horse power than 2005 Kia Optima. (170 HP @ 4000 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 278 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.
Both vehicles are front wheel drive (FWD). Which offers better traction when its slippery than rear wheel drive vehicles. 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 (288 Nm) has 47 more torque (in Nm) than 2005 Kia Optima. (241 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 | 2671 cc | 3311 cc |
| Engine Cylinders | 6 cylinders | 6 cylinders |
| Engine Type | V | V |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 170 HP | 268 HP |
| Engine RPM | 4000 RPM | 5600 RPM |
| Torque | 241 Nm | 288 Nm |
| Engine Bore Size | 87 mm | 92 mm |
| Engine Stroke Size | 75 mm | 83 mm |
| Drive Type | Front | Front |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 4 doors | 5 doors |
| Vehicle Weight | 1487 kg | 1765 kg |
| Vehicle Length | 4730 mm | 4760 mm |
| Vehicle Width | 1820 mm | 1850 mm |
| Vehicle Height | 1420 mm | 1690 mm |
| Wheelbase Size | 2710 mm | 2720 mm |
| Fuel Consumption Highway | 8.9 L/100km | 8.4 L/100km |
| Fuel Consumption City | 11.9 L/100km | 7.1 L/100km |
| Fuel Consumption Overall | 10.4 L/100km | 8.1 L/100km |
| Fuel Tank Capacity | 65 L | 65 L |
