2008 Daihatsu Sirion vs. 2005 Kia Optima
To start off, 2008 Daihatsu Sirion is newer by 3 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 2,670 cc (6 cylinders), 2005 Kia Optima is equipped with a bigger engine. In terms of performance, 2005 Kia Optima (170 HP @ 4000 RPM) has 84 more horse power than 2008 Daihatsu Sirion. (86 HP @ 6000 RPM) In normal driving conditions, 2005 Kia Optima should accelerate faster than 2008 Daihatsu Sirion. With that said, vehicle weight also plays an important factor in acceleration. 2005 Kia Optima weights approximately 547 kg more than 2008 Daihatsu Sirion. 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, 2005 Kia Optima (245 Nm) has 125 more torque (in Nm) than 2008 Daihatsu Sirion. (120 Nm). This means 2005 Kia Optima will have an easier job in driving up hills or pulling heavy equipment than 2008 Daihatsu Sirion.
Compare all specifications:
| 2008 Daihatsu Sirion | 2005 Kia Optima | |
| Make | Daihatsu | Kia |
| Model | Sirion | Optima |
| Year Released | 2008 | 2005 |
| Body Type | Hatchback | Sedan |
| Engine Position | Front | Front |
| Engine Size | 1298 cc | 2670 cc |
| Engine Cylinders | 4 cylinders | 6 cylinders |
| Engine Type | in-line | V |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 86 HP | 170 HP |
| Engine RPM | 6000 RPM | 4000 RPM |
| Torque | 120 Nm | 245 Nm |
| Engine Bore Size | 72 mm | 87 mm |
| Engine Stroke Size | 79.7 mm | 75 mm |
| Engine Compression Ratio | 10.0:1 | 10.0:1 |
| Drive Type | Front | Front |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 5 doors | 4 doors |
| Vehicle Weight | 940 kg | 1487 kg |
| Vehicle Length | 3610 mm | 4730 mm |
| Vehicle Width | 1560 mm | 1820 mm |
| Vehicle Height | 1670 mm | 1420 mm |
| Wheelbase Size | 2440 mm | 2640 mm |
| Fuel Consumption Overall | 5 L/100km | 10.2 L/100km |
| Fuel Tank Capacity | 40 L | 65 L |
