2001 Alfa Romeo 156 vs. 2003 Opel Signum
To start off, 2003 Opel Signum is newer by 2 year(s). Which means there will be less support and parts availability for 2001 Alfa Romeo 156. In addition, the cost of maintenance, including insurance, on 2001 Alfa Romeo 156 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 @ 4000 RPM) has 57 more horse power than 2001 Alfa Romeo 156. (118 HP @ 6400 RPM) In normal driving conditions, 2003 Opel Signum should accelerate faster than 2001 Alfa Romeo 156. With that said, vehicle weight also plays an important factor in acceleration. 2003 Opel Signum weights approximately 355 kg more than 2001 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 (371 Nm @ 1900 RPM) has 231 more torque (in Nm) than 2001 Alfa Romeo 156. (140 Nm @ 4500 RPM). This means 2003 Opel Signum will have an easier job in driving up hills or pulling heavy equipment than 2001 Alfa Romeo 156.
Compare all specifications:
| 2001 Alfa Romeo 156 | 2003 Opel Signum | |
| Make | Alfa Romeo | Opel |
| Model | 156 | Signum |
| Year Released | 2001 | 2003 |
| Body Type | Station Wagon | Hatchback |
| Engine Position | Front | Front |
| Engine Size | 1597 cc | 2958 cc |
| Engine Cylinders | 4 cylinders | 6 cylinders |
| Engine Type | in-line | V |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 118 HP | 175 HP |
| Engine RPM | 6400 RPM | 4000 RPM |
| Torque | 140 Nm | 371 Nm |
| Torque RPM | 4500 RPM | 1900 RPM |
| Engine Bore Size | 82 mm | 87.5 mm |
| Engine Stroke Size | 75.6 mm | 82 mm |
| Fuel Type | Gasoline | Diesel |
| Acceleration 0-100mph | 11 seconds | 9.4 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 | 1315 kg | 1670 kg |
| Vehicle Length | 4450 mm | 4640 mm |
| Vehicle Width | 1750 mm | 1800 mm |
| Vehicle Height | 1430 mm | 1470 mm |
| Wheelbase Size | 2600 mm | 2700 mm |
| Fuel Consumption Overall | 5.9 L/100km | 7.4 L/100km |
| Fuel Tank Capacity | 63 L | 60 L |
