2004 Kia Optima vs. 2011 Daihatsu Sirion
To start off, 2011 Daihatsu Sirion is newer by 7 year(s). Which means there will be less support and parts availability for 2004 Kia Optima. In addition, the cost of maintenance, including insurance, on 2004 Kia Optima would be higher. At 2,360 cc (4 cylinders), 2004 Kia Optima is equipped with a bigger engine. In terms of performance, 2004 Kia Optima (137 HP @ 4000 RPM) has 51 more horse power than 2011 Daihatsu Sirion. (86 HP @ 6000 RPM). In normal driving conditions, 2004 Kia Optima should accelerate faster than 2011 Daihatsu Sirion.
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, 2004 Kia Optima (199 Nm) has 78 more torque (in Nm) than 2011 Daihatsu Sirion. (121 Nm). This means 2004 Kia Optima will have an easier job in driving up hills or pulling heavy equipment than 2011 Daihatsu Sirion.
Compare all specifications:
| 2004 Kia Optima | 2011 Daihatsu Sirion | |
| Make | Kia | Daihatsu |
| Model | Optima | Sirion |
| Year Released | 2004 | 2011 |
| Body Type | Sedan | Hatchback |
| Engine Position | Front | Front |
| Engine Size | 2360 cc | 1298 cc |
| Engine Cylinders | 4 cylinders | 4 cylinders |
| Engine Type | in-line | in-line |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 137 HP | 86 HP |
| Engine RPM | 4000 RPM | 6000 RPM |
| Torque | 199 Nm | 121 Nm |
| Engine Bore Size | 87.1 mm | 72 mm |
| Engine Stroke Size | 100 mm | 79.7 mm |
| Drive Type | Front | Front |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 4 doors | 5 doors |
