2006 Alfa Romeo 156 vs. 2003 Opel Signum
To start off, 2006 Alfa Romeo 156 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 61 more horse power than 2006 Alfa Romeo 156. (114 HP @ 4000 RPM) In normal driving conditions, 2003 Opel Signum should accelerate faster than 2006 Alfa Romeo 156. With that said, vehicle weight also plays an important factor in acceleration. 2003 Opel Signum weights approximately 267 kg more than 2006 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, 2003 Opel Signum (370 Nm @ 1900 RPM) has 95 more torque (in Nm) than 2006 Alfa Romeo 156. (275 Nm @ 2000 RPM). This means 2003 Opel Signum will have an easier job in driving up hills or pulling heavy equipment than 2006 Alfa Romeo 156.
Compare all specifications:
| 2006 Alfa Romeo 156 | 2003 Opel Signum | |
| Make | Alfa Romeo | Opel |
| Model | 156 | Signum |
| Year Released | 2006 | 2003 |
| Body Type | Sedan | Hatchback |
| Engine Position | Front | Front |
| Engine Size | 1910 cc | 2958 cc |
| Engine Cylinders | 4 cylinders | 6 cylinders |
| Engine Type | in-line | in-line |
| Valves per Cylinder | 2 valves | 4 valves |
| Horse Power | 114 HP | 175 HP |
| Engine RPM | 4000 RPM | 5500 RPM |
| Torque | 275 Nm | 370 Nm |
| Torque RPM | 2000 RPM | 1900 RPM |
| Fuel Type | Diesel | Diesel |
| Drive Type | Front | Front |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 4 doors | 5 doors |
| Vehicle Weight | 1308 kg | 1575 kg |
| Vehicle Length | 4440 mm | 4640 mm |
| Vehicle Width | 1750 mm | 1800 mm |
| Vehicle Height | 1440 mm | 1470 mm |
| Wheelbase Size | 2600 mm | 2840 mm |
