2005 Kia Optima vs. 2006 Opel Signum
To start off, 2006 Opel Signum 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 2,958 cc (6 cylinders), 2006 Opel Signum is equipped with a bigger engine. In terms of performance, 2006 Opel Signum (175 HP @ 4000 RPM) has 5 more horse power than 2005 Kia Optima. (170 HP @ 4000 RPM) In normal driving conditions, 2006 Opel Signum should accelerate faster than 2005 Kia Optima. With that said, vehicle weight also plays an important factor in acceleration. 2006 Opel Signum weights approximately 183 kg more than 2005 Kia Optima. 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 Opel Signum (370 Nm) has 125 more torque (in Nm) than 2005 Kia Optima. (245 Nm). This means 2006 Opel Signum will have an easier job in driving up hills or pulling heavy equipment than 2005 Kia Optima.
Compare all specifications:
| 2005 Kia Optima | 2006 Opel Signum | |
| Make | Kia | Opel |
| Model | Optima | Signum |
| Year Released | 2005 | 2006 |
| Body Type | Sedan | Hatchback |
| Engine Position | Front | Front |
| Engine Size | 2670 cc | 2958 cc |
| Engine Cylinders | 6 cylinders | 6 cylinders |
| Engine Type | V | V |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 170 HP | 175 HP |
| Engine RPM | 4000 RPM | 4000 RPM |
| Torque | 245 Nm | 370 Nm |
| Engine Bore Size | 87 mm | 87.5 mm |
| Engine Stroke Size | 75 mm | 82 mm |
| Engine Compression Ratio | 10.0:1 | 18.5:1 |
| Drive Type | Front | Front |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 4 doors | 5 doors |
| Vehicle Weight | 1487 kg | 1670 kg |
| Vehicle Length | 4730 mm | 4640 mm |
| Vehicle Width | 1820 mm | 1800 mm |
| Vehicle Height | 1420 mm | 1470 mm |
| Wheelbase Size | 2640 mm | 2840 mm |
| Fuel Consumption Overall | 10.2 L/100km | 7.6 L/100km |
| Fuel Tank Capacity | 65 L | 60 L |
