2005 Daihatsu Sirion vs. 2006 Kia Optima
To start off, 2006 Kia Optima is newer by 1 year(s). Which means there will be less support and parts availability for 2005 Daihatsu Sirion. In addition, the cost of maintenance, including insurance, on 2005 Daihatsu Sirion would be higher. At 2,360 cc (4 cylinders), 2006 Kia Optima is equipped with a bigger engine. In terms of performance, 2006 Kia Optima (138 HP @ 5500 RPM) has 69 more horse power than 2005 Daihatsu Sirion. (69 HP @ 6000 RPM) In normal driving conditions, 2006 Kia Optima should accelerate faster than 2005 Daihatsu Sirion. With that said, vehicle weight also plays an important factor in acceleration. 2006 Kia Optima weights approximately 598 kg more than 2005 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, 2006 Kia Optima (199 Nm @ 3000 RPM) has 109 more torque (in Nm) than 2005 Daihatsu Sirion. (90 Nm @ 3600 RPM). This means 2006 Kia Optima will have an easier job in driving up hills or pulling heavy equipment than 2005 Daihatsu Sirion.
Compare all specifications:
| 2005 Daihatsu Sirion | 2006 Kia Optima | |
| Make | Daihatsu | Kia |
| Model | Sirion | Optima |
| Year Released | 2005 | 2006 |
| Body Type | Hatchback | Sedan |
| Engine Position | Front | Front |
| Engine Size | 987 cc | 2360 cc |
| Engine Cylinders | 3 cylinders | 4 cylinders |
| Engine Type | in-line | in-line |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 69 HP | 138 HP |
| Engine RPM | 6000 RPM | 5500 RPM |
| Torque | 90 Nm | 199 Nm |
| Torque RPM | 3600 RPM | 3000 RPM |
| Engine Bore Size | 71 mm | 86.6 mm |
| Engine Stroke Size | 84 mm | 100 mm |
| Engine Compression Ratio | 10.5:1 | 10.0:1 |
| Fuel Type | Gasoline - Premium | Gasoline - Premium |
| Drive Type | Front | Front |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 5 doors | 4 doors |
| Vehicle Weight | 890 kg | 1488 kg |
| Vehicle Length | 3610 mm | 4730 mm |
| Vehicle Width | 1670 mm | 1820 mm |
| Vehicle Height | 1560 mm | 1420 mm |
| Wheelbase Size | 2380 mm | 2710 mm |
| Fuel Consumption Overall | 5 L/100km | 9.4 L/100km |
| Fuel Tank Capacity | 40 L | 65 L |
