2003 Opel Signum vs. 2008 Alfa Romeo 156
To start off, 2008 Alfa Romeo 156 is newer by 5 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 1,998 cc (4 cylinders), 2003 Opel Signum is equipped with a bigger engine. In terms of performance, 2008 Alfa Romeo 156 (148 HP @ 6300 RPM) has 49 more horse power than 2003 Opel Signum. (99 HP @ 3120 RPM) In normal driving conditions, 2008 Alfa Romeo 156 should accelerate faster than 2003 Opel Signum. With that said, vehicle weight also plays an important factor in acceleration. 2003 Opel Signum weights approximately 335 kg more than 2008 Alfa Romeo 156.
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 (230 Nm @ 1500 RPM) has 48 more torque (in Nm) than 2008 Alfa Romeo 156. (182 Nm @ 3800 RPM). This means 2003 Opel Signum will have an easier job in driving up hills or pulling heavy equipment than 2008 Alfa Romeo 156.
Compare all specifications:
| 2003 Opel Signum | 2008 Alfa Romeo 156 | |
| Make | Opel | Alfa Romeo |
| Model | Signum | 156 |
| Year Released | 2003 | 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 | 99 HP | 148 HP |
| Engine RPM | 3120 RPM | 6300 RPM |
| Torque | 230 Nm | 182 Nm |
| Torque RPM | 1500 RPM | 3800 RPM |
| Engine Bore Size | 84 mm | 83 mm |
| Engine Stroke Size | 90 mm | 91 mm |
| Fuel Type | Diesel | Gasoline |
| Top Speed | 185 km/hour | 214 km/hour |
| Acceleration 0-100mph | 14.3 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 | 1620 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 | 5.9 L/100km | 8.7 L/100km |
| Fuel Tank Capacity | 60 L | 63 L |
