2008 Opel Signum vs. 2005 Opel Vectra
To start off, 2008 Opel Signum is newer by 3 year(s). Which means there will be less support and parts availability for 2005 Opel Vectra. In addition, the cost of maintenance, including insurance, on 2005 Opel Vectra would be higher. At 2,198 cc (4 cylinders), 2005 Opel Vectra is equipped with a bigger engine. In terms of performance, 2008 Opel Signum (173 HP @ 5500 RPM) has 20 more horse power than 2005 Opel Vectra. (153 HP @ 5600 RPM). In normal driving conditions, 2008 Opel Signum should accelerate faster than 2005 Opel Vectra. With that said, vehicle weight also plays an important factor in acceleration. 2008 Opel Signum weights approximately 10 kg more than 2005 Opel Vectra. 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, 2008 Opel Signum (265 Nm @ 2500 RPM) has 44 more torque (in Nm) than 2005 Opel Vectra. (221 Nm @ 3800 RPM). This means 2008 Opel Signum will have an easier job in driving up hills or pulling heavy equipment than 2005 Opel Vectra.
Compare all specifications:
| 2008 Opel Signum | 2005 Opel Vectra | |
| Make | Opel | Opel |
| Model | Signum | Vectra |
| Year Released | 2008 | 2005 |
| Engine Position | Front | Front |
| Engine Size | 1998 cc | 2198 cc |
| Engine Cylinders | 4 cylinders | 4 cylinders |
| Engine Type | in-line | in-line |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 173 HP | 153 HP |
| Engine RPM | 5500 RPM | 5600 RPM |
| Torque | 265 Nm | 221 Nm |
| Torque RPM | 2500 RPM | 3800 RPM |
| Engine Bore Size | 86 mm | 86 mm |
| Engine Stroke Size | 86 mm | 94.6 mm |
| Fuel Type | Gasoline - Premium | Gasoline - Premium |
| Top Speed | 220 km/hour | 212 km/hour |
| Acceleration 0-100mph | 9.4 seconds | 10.1 seconds |
| Drive Type | Front | Front |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 5 doors | 5 doors |
| Vehicle Weight | 1560 kg | 1550 kg |
| Vehicle Length | 4640 mm | 4830 mm |
| Vehicle Width | 1800 mm | 1800 mm |
| Vehicle Height | 1470 mm | 1510 mm |
| Wheelbase Size | 2840 mm | 2840 mm |
| Fuel Consumption Overall | 9.2 L/100km | 8.1 L/100km |
| Fuel Tank Capacity | 60 L | 58 L |
