2008 Opel Signum vs. 2004 Opel Vectra
To start off, 2008 Opel Signum is newer by 4 year(s). Which means there will be less support and parts availability for 2004 Opel Vectra. In addition, the cost of maintenance, including insurance, on 2004 Opel Vectra would be higher. At 2,958 cc (6 cylinders), 2004 Opel Vectra is equipped with a bigger engine. In terms of performance, 2008 Opel Signum (149 HP @ 4000 RPM) has 1 more horse power than 2004 Opel Vectra. (148 HP @ 4000 RPM). In normal driving conditions, 2008 Opel Signum should accelerate faster than 2004 Opel Vectra. With that said, vehicle weight also plays an important factor in acceleration. 2004 Opel Vectra weights approximately 25 kg more than 2008 Opel Signum.
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, 2004 Opel Vectra (370 Nm @ 1900 RPM) has 55 more torque (in Nm) than 2008 Opel Signum. (315 Nm @ 2000 RPM). This means 2004 Opel Vectra will have an easier job in driving up hills or pulling heavy equipment than 2008 Opel Signum. 2004 Opel Vectra has automatic transmission and 2008 Opel Signum has manual transmission. 2008 Opel Signum will offer better control over acceleration and deceleration in addition to better fuel efficiency overall. 2004 Opel Vectra will be easier to drive especially in heavy traffic.
Compare all specifications:
| 2008 Opel Signum | 2004 Opel Vectra | |
| Make | Opel | Opel |
| Model | Signum | Vectra |
| Year Released | 2008 | 2004 |
| Body Type | Hatchback | Sedan |
| Engine Position | Front | Front |
| Engine Size | 1910 cc | 2958 cc |
| Engine Cylinders | 4 cylinders | 6 cylinders |
| Engine Type | in-line | V |
| Valves per Cylinder | 2 valves | 4 valves |
| Horse Power | 149 HP | 148 HP |
| Engine RPM | 4000 RPM | 4000 RPM |
| Torque | 315 Nm | 370 Nm |
| Torque RPM | 2000 RPM | 1900 RPM |
| Engine Compression Ratio | 18.0:1 | 18.5:1 |
| Top Speed | 209 km/hour | 218 km/hour |
| Acceleration 0-100mph | 10.5 seconds | 9.5 seconds |
| Drive Type | Front | Front |
| Transmission Type | Manual | Automatic |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 5 doors | 4 doors |
| Vehicle Weight | 1613 kg | 1638 kg |
| Vehicle Length | 4640 mm | 4600 mm |
| Vehicle Width | 1800 mm | 1800 mm |
| Vehicle Height | 1470 mm | 1470 mm |
| Wheelbase Size | 2840 mm | 2840 mm |
| Fuel Consumption | 5.1 L/100km | 5.5 L/100km |
| Fuel Consumption City | 7.8 L/100km | 10.7 L/100km |
| Fuel Consumption Overall | 6.1 L/100km | 7.4 L/100km |
| Fuel Tank Capacity | 60 L | 61 L |
