2006 Fiat Siena vs. 2005 Kia Optima
To start off, 2006 Fiat Siena is newer by 1 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 2,671 cc (6 cylinders), 2005 Kia Optima is equipped with a bigger engine. In terms of performance, 2005 Kia Optima (170 HP @ 4000 RPM) has 98 more horse power than 2006 Fiat Siena. (72 HP @ 6000 RPM) In normal driving conditions, 2005 Kia Optima should accelerate faster than 2006 Fiat Siena. With that said, vehicle weight also plays an important factor in acceleration. 2005 Kia Optima weights approximately 317 kg more than 2006 Fiat Siena. 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 (241 Nm) has 139 more torque (in Nm) than 2006 Fiat Siena. (102 Nm). This means 2005 Kia Optima will have an easier job in driving up hills or pulling heavy equipment than 2006 Fiat Siena.
Compare all specifications:
| 2006 Fiat Siena | 2005 Kia Optima | |
| Make | Fiat | Kia |
| Model | Siena | Optima |
| Year Released | 2006 | 2005 |
| Body Type | Sedan | Sedan |
| Engine Position | Front | Front |
| Engine Size | 1242 cc | 2671 cc |
| Engine Cylinders | 4 cylinders | 6 cylinders |
| Engine Type | in-line | V |
| Valves per Cylinder | 2 valves | 4 valves |
| Horse Power | 72 HP | 170 HP |
| Engine RPM | 6000 RPM | 4000 RPM |
| Torque | 102 Nm | 241 Nm |
| Engine Bore Size | 70.8 mm | 87 mm |
| Engine Stroke Size | 78.8 mm | 75 mm |
| Engine Compression Ratio | 9.1:1 | 10.0:1 |
| Drive Type | Front | Front |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 4 doors | 4 doors |
| Vehicle Weight | 1170 kg | 1487 kg |
| Vehicle Length | 3830 mm | 4730 mm |
| Vehicle Width | 1640 mm | 1820 mm |
| Vehicle Height | 1440 mm | 1420 mm |
| Wheelbase Size | 2380 mm | 2710 mm |
| Fuel Consumption Overall | 7.8 L/100km | 10.4 L/100km |
| Fuel Tank Capacity | 54 L | 65 L |
