2006 Kia Optima vs. 2005 Toyota Sienna
To start off, 2006 Kia Optima is newer by 1 year(s). Which means there will be less support and parts availability for 2005 Toyota Sienna. In addition, the cost of maintenance, including insurance, on 2005 Toyota Sienna would be higher. At 3,298 cc (6 cylinders), 2005 Toyota Sienna is equipped with a bigger engine. In terms of performance, 2005 Toyota Sienna (230 HP @ 5200 RPM) has 92 more horse power than 2006 Kia Optima. (138 HP @ 5500 RPM) In normal driving conditions, 2005 Toyota Sienna should accelerate faster than 2006 Kia Optima. With that said, vehicle weight also plays an important factor in acceleration. 2006 Kia Optima weights approximately 111 kg more than 2005 Toyota Sienna.
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 Toyota Sienna (343 Nm) has 144 more torque (in Nm) than 2006 Kia Optima. (199 Nm). This means 2005 Toyota Sienna will have an easier job in driving up hills or pulling heavy equipment than 2006 Kia Optima. 2005 Toyota Sienna has automatic transmission and 2006 Kia Optima has manual transmission. 2006 Kia Optima will offer better control over acceleration and deceleration in addition to better fuel efficiency overall. 2005 Toyota Sienna will be easier to drive especially in heavy traffic.
Compare all specifications:
| 2006 Kia Optima | 2005 Toyota Sienna | |
| Make | Kia | Toyota |
| Model | Optima | Sienna |
| Year Released | 2006 | 2005 |
| Body Type | Sedan | Minivan |
| Engine Position | Front | Front |
| Engine Size | 2351 cc | 3298 cc |
| Engine Cylinders | 4 cylinders | 6 cylinders |
| Engine Type | in-line | V |
| Horse Power | 138 HP | 230 HP |
| Engine RPM | 5500 RPM | 5200 RPM |
| Torque | 199 Nm | 343 Nm |
| Engine Bore Size | 86.5 mm | 92 mm |
| Engine Stroke Size | 100 mm | 83 mm |
| Engine Compression Ratio | 10.0:1 | 10.8:1 |
| Drive Type | Front | Front |
| Transmission Type | Manual | Automatic |
| Number of Seats | 5 seats | 7 seats |
| Number of Doors | 4 doors | 4 doors |
| Vehicle Weight | 2000 kg | 1889 kg |
| Vehicle Length | 4730 mm | 5090 mm |
| Vehicle Width | 1820 mm | 1970 mm |
| Vehicle Height | 1420 mm | 1760 mm |
| Wheelbase Size | 2710 mm | 3040 mm |
| Fuel Consumption | 7.8 L/100km | 9.1 L/100km |
| Fuel Consumption City | 10.7 L/100km | 12.4 L/100km |
| Fuel Consumption Overall | 9.4 L/100km | 11.2 L/100km |
| Fuel Tank Capacity | 65 L | 76 L |
