2008 Opel Astra vs. 2006 Opel Signum
To start off, 2008 Opel Astra is newer by 2 year(s). Which means there will be less support and parts availability for 2006 Opel Signum. In addition, the cost of maintenance, including insurance, on 2006 Opel Signum would be higher. At 2,198 cc (4 cylinders), 2006 Opel Signum is equipped with a bigger engine. In terms of performance, 2008 Opel Astra (168 HP @ 5200 RPM) has 15 more horse power than 2006 Opel Signum. (153 HP @ 5600 RPM). In normal driving conditions, 2008 Opel Astra should accelerate faster than 2006 Opel Signum. With that said, vehicle weight also plays an important factor in acceleration. 2006 Opel Signum weights approximately 150 kg more than 2008 Opel Astra.
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 Astra (250 Nm @ 1950 RPM) has 30 more torque (in Nm) than 2006 Opel Signum. (220 Nm @ 3800 RPM). This means 2008 Opel Astra will have an easier job in driving up hills or pulling heavy equipment than 2006 Opel Signum.
Compare all specifications:
| 2008 Opel Astra | 2006 Opel Signum | |
| Make | Opel | Opel |
| Model | Astra | Signum |
| Year Released | 2008 | 2006 |
| Engine Position | Front | Front |
| Engine Size | 1998 cc | 2198 cc |
| Engine Cylinders | 4 cylinders | 4 cylinders |
| Engine Type | in-line | in-line |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 168 HP | 153 HP |
| Engine RPM | 5200 RPM | 5600 RPM |
| Torque | 250 Nm | 220 Nm |
| Torque RPM | 1950 RPM | 3800 RPM |
| Engine Bore Size | 86 mm | 86 mm |
| Engine Stroke Size | 86 mm | 94.6 mm |
| Engine Compression Ratio | 8.8:1 | 12.0:1 |
| Fuel Type | Gasoline - Premium | Gasoline - Premium |
| Top Speed | 217 km/hour | 211 km/hour |
| Acceleration 0-100mph | 8.7 seconds | 9.8 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 | 1385 kg | 1535 kg |
| Vehicle Length | 4260 mm | 4640 mm |
| Vehicle Width | 1760 mm | 1800 mm |
| Vehicle Height | 1470 mm | 1470 mm |
| Wheelbase Size | 2620 mm | 2840 mm |
| Fuel Consumption Overall | 9.2 L/100km | 8.3 L/100km |
| Fuel Tank Capacity | 52 L | 60 L |
