2003 Opel Signum vs. 2006 Opel Astra
To start off, 2006 Opel Astra is newer by 3 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 @ 5500 RPM) has 71 more horse power than 2006 Opel Astra. (104 HP @ 6000 RPM). In normal driving conditions, 2003 Opel Signum should accelerate faster than 2006 Opel Astra. With that said, vehicle weight also plays an important factor in acceleration. 2003 Opel Signum weights approximately 309 kg more than 2006 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 220 more torque (in Nm) than 2006 Opel Astra. (150 Nm @ 3900 RPM). This means 2003 Opel Signum will have an easier job in driving up hills or pulling heavy equipment than 2006 Opel Astra.
Compare all specifications:
| 2003 Opel Signum | 2006 Opel Astra | |
| Make | Opel | Opel |
| Model | Signum | Astra |
| Year Released | 2003 | 2006 |
| Engine Position | Front | Front |
| Engine Size | 2958 cc | 1598 cc |
| Engine Cylinders | 6 cylinders | 4 cylinders |
| Engine Type | in-line | in-line |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 175 HP | 104 HP |
| Engine RPM | 5500 RPM | 6000 RPM |
| Torque | 370 Nm | 150 Nm |
| Torque RPM | 1900 RPM | 3900 RPM |
| Fuel Type | Diesel | Gasoline - Premium |
| Drive Type | Front | Front |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 5 doors | 5 doors |
| Vehicle Weight | 1575 kg | 1266 kg |
| Vehicle Length | 4640 mm | 4260 mm |
| Vehicle Width | 1800 mm | 1760 mm |
| Vehicle Height | 1470 mm | 1470 mm |
| Wheelbase Size | 2840 mm | 2620 mm |
