2008 Opel Signum vs. 2008 Alfa Romeo 156
To start off, both 2008 Opel Signum and 2008 Alfa Romeo 156 were released in the same year (2008). Therefore the support and the availability on parts for both vehicles should be relatively similar. At 1,998 cc (4 cylinders), 2008 Opel Signum is equipped with a bigger engine. In terms of performance, 2008 Opel Signum (173 HP @ 5500 RPM) has 25 more horse power than 2008 Alfa Romeo 156. (148 HP @ 6300 RPM). In normal driving conditions, 2008 Opel Signum should accelerate faster than 2008 Alfa Romeo 156. With that said, vehicle weight also plays an important factor in acceleration. 2008 Opel Signum weights approximately 275 kg more than 2008 Alfa Romeo 156. 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, 2008 Opel Signum (265 Nm @ 2500 RPM) has 83 more torque (in Nm) than 2008 Alfa Romeo 156. (182 Nm @ 3800 RPM). This means 2008 Opel Signum will have an easier job in driving up hills or pulling heavy equipment than 2008 Alfa Romeo 156.
Compare all specifications:
| 2008 Opel Signum | 2008 Alfa Romeo 156 | |
| Make | Opel | Alfa Romeo |
| Model | Signum | 156 |
| Year Released | 2008 | 2008 |
| Body Type | Hatchback | Sedan |
| Engine Position | Front | Front |
| Engine Size | 1998 cc | 1970 cc |
| Engine Cylinders | 4 cylinders | 4 cylinders |
| Engine Type | in-line | in-line |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 173 HP | 148 HP |
| Engine RPM | 5500 RPM | 6300 RPM |
| Torque | 265 Nm | 182 Nm |
| Torque RPM | 2500 RPM | 3800 RPM |
| Engine Bore Size | 86 mm | 83 mm |
| Engine Stroke Size | 86 mm | 91 mm |
| Fuel Type | Gasoline - Premium | Gasoline |
| Top Speed | 220 km/hour | 214 km/hour |
| Acceleration 0-100mph | 9.4 seconds | 8.8 seconds |
| Drive Type | Front | Front |
| Transmission Type | Manual | Manual |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 5 doors | 4 doors |
| Vehicle Weight | 1560 kg | 1285 kg |
| Vehicle Length | 4640 mm | 4440 mm |
| Vehicle Width | 1800 mm | 1750 mm |
| Vehicle Height | 1470 mm | 1440 mm |
| Wheelbase Size | 2840 mm | 2600 mm |
| Fuel Consumption Overall | 9.2 L/100km | 8.7 L/100km |
| Fuel Tank Capacity | 60 L | 63 L |
