2007 Opel Signum vs. 2005 Opel Astra
To start off, 2007 Opel Signum is newer by 2 year(s). Which means there will be less support and parts availability for 2005 Opel Astra. In addition, the cost of maintenance, including insurance, on 2005 Opel Astra would be higher. At 2,958 cc (6 cylinders), 2007 Opel Signum is equipped with a bigger engine. In terms of performance, 2007 Opel Signum (175 HP @ 4000 RPM) has 78 more horse power than 2005 Opel Astra. (97 HP @ 6000 RPM). In normal driving conditions, 2007 Opel Signum should accelerate faster than 2005 Opel Astra. With that said, vehicle weight also plays an important factor in acceleration. 2007 Opel Signum weights approximately 590 kg more than 2005 Opel Astra. 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, 2007 Opel Signum (370 Nm @ 1900 RPM) has 228 more torque (in Nm) than 2005 Opel Astra. (142 Nm @ 3600 RPM). This means 2007 Opel Signum will have an easier job in driving up hills or pulling heavy equipment than 2005 Opel Astra.
Compare all specifications:
| 2007 Opel Signum | 2005 Opel Astra | |
| Make | Opel | Opel |
| Model | Signum | Astra |
| Year Released | 2007 | 2005 |
| Engine Position | Front | Front |
| Engine Size | 2958 cc | 1598 cc |
| Engine Cylinders | 6 cylinders | 4 cylinders |
| Engine Type | V | in-line |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 175 HP | 97 HP |
| Engine RPM | 4000 RPM | 6000 RPM |
| Torque | 370 Nm | 142 Nm |
| Torque RPM | 1900 RPM | 3600 RPM |
| Engine Compression Ratio | 18.5:1 | 9.8:1 |
| Top Speed | 221 km/hour | 193 km/hour |
| Acceleration 0-100mph | 9.7 seconds | 11.5 seconds |
| Drive Type | Front | Front |
| Transmission Type | Manual | Manual |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 5 doors | 5 doors |
| Vehicle Weight | 1670 kg | 1080 kg |
| Wheelbase Size | 2840 mm | 2710 mm |
| Fuel Consumption Overall | 7.4 L/100km | 7.7 L/100km |
| Fuel Tank Capacity | 60 L | 52 L |
