2003 Opel Signum vs. 2007 Opel Astra
To start off, 2007 Opel Astra is newer by 4 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 2,958 cc (6 cylinders), 2003 Opel Signum is equipped with a bigger engine. In terms of performance, 2003 Opel Signum (175 HP @ 4000 RPM) has 51 more horse power than 2007 Opel Astra. (124 HP @ 5600 RPM). In normal driving conditions, 2003 Opel Signum should accelerate faster than 2007 Opel Astra. With that said, vehicle weight also plays an important factor in acceleration. 2003 Opel Signum weights approximately 345 kg more than 2007 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, 2003 Opel Signum (370 Nm @ 1900 RPM) has 200 more torque (in Nm) than 2007 Opel Astra. (170 Nm @ 3800 RPM). This means 2003 Opel Signum will have an easier job in driving up hills or pulling heavy equipment than 2007 Opel Astra.
Compare all specifications:
| 2003 Opel Signum | 2007 Opel Astra | |
| Make | Opel | Opel |
| Model | Signum | Astra |
| Year Released | 2003 | 2007 |
| Body Type | Hatchback | Station Wagon |
| Engine Position | Front | Front |
| Engine Size | 2958 cc | 1796 cc |
| Engine Cylinders | 6 cylinders | 4 cylinders |
| Engine Type | V | in-line |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 175 HP | 124 HP |
| Engine RPM | 4000 RPM | 5600 RPM |
| Torque | 370 Nm | 170 Nm |
| Torque RPM | 1900 RPM | 3800 RPM |
| Engine Bore Size | 87.5 mm | 80.5 mm |
| Engine Stroke Size | 82 mm | 88.2 mm |
| Engine Compression Ratio | 18.5:1 | 10.5:1 |
| Top Speed | 221 km/hour | 198 km/hour |
| Acceleration 0-100mph | 9.4 seconds | 10.9 seconds |
| Drive Type | Front | Front |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 5 doors | 5 doors |
| Vehicle Weight | 1670 kg | 1325 kg |
| Vehicle Length | 4640 mm | 4520 mm |
| Vehicle Width | 1800 mm | 1800 mm |
| Vehicle Height | 1470 mm | 1510 mm |
| Wheelbase Size | 2700 mm | 2710 mm |
| Fuel Consumption Overall | 7.4 L/100km | 7.8 L/100km |
| Fuel Tank Capacity | 60 L | 52 L |
