2008 Opel Vectra vs. 2003 Opel Signum
To start off, 2008 Opel Vectra is newer by 5 year(s). Which means there will be less support and parts availability for 2003 Opel Signum. In addition, the cost of maintenance, including insurance, on 2003 Opel Signum would be higher. At 3,173 cc (6 cylinders), 2003 Opel Signum is equipped with a bigger engine. In terms of performance, 2008 Opel Vectra (277 HP @ 5500 RPM) has 69 more horse power than 2003 Opel Signum. (208 HP @ 6200 RPM). In normal driving conditions, 2008 Opel Vectra should accelerate faster than 2003 Opel Signum. With that said, vehicle weight also plays an important factor in acceleration. 2008 Opel Vectra weights approximately 3 kg more than 2003 Opel Signum. 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 Vectra (355 Nm @ 1800 RPM) has 55 more torque (in Nm) than 2003 Opel Signum. (300 Nm @ 4000 RPM). This means 2008 Opel Vectra will have an easier job in driving up hills or pulling heavy equipment than 2003 Opel Signum.
Compare all specifications:
| 2008 Opel Vectra | 2003 Opel Signum | |
| Make | Opel | Opel |
| Model | Vectra | Signum |
| Year Released | 2008 | 2003 |
| Engine Position | Front | Front |
| Engine Size | 2792 cc | 3173 cc |
| Engine Cylinders | 6 cylinders | 6 cylinders |
| Engine Type | V | V |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 277 HP | 208 HP |
| Engine RPM | 5500 RPM | 6200 RPM |
| Torque | 355 Nm | 300 Nm |
| Torque RPM | 1800 RPM | 4000 RPM |
| Engine Bore Size | 89 mm | 87.5 mm |
| Engine Stroke Size | 74.8 mm | 88 mm |
| Engine Compression Ratio | 9.5:1 | 10.0:1 |
| Fuel Type | Gasoline - Premium | Gasoline - Premium |
| Top Speed | 250 km/hour | 237 km/hour |
| Drive Type | Front | Front |
| Transmission Type | Manual | Manual |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 5 doors | 5 doors |
| Vehicle Weight | 1613 kg | 1610 kg |
| Vehicle Length | 4880 mm | 4640 mm |
| Vehicle Width | 1800 mm | 1800 mm |
| Vehicle Height | 1490 mm | 1470 mm |
| Wheelbase Size | 2840 mm | 2740 mm |
| Fuel Consumption Overall | 10.4 L/100km | 10.1 L/100km |
| Fuel Tank Capacity | 61 L | 52 L |
