2003 Alfa Romeo 156 vs. 2006 Opel Signum
To start off, 2006 Opel Signum is newer by 3 year(s). Which means there will be less support and parts availability for 2003 Alfa Romeo 156. In addition, the cost of maintenance, including insurance, on 2003 Alfa Romeo 156 would be higher. At 3,179 cc (6 cylinders), 2003 Alfa Romeo 156 is equipped with a bigger engine. In terms of performance, 2003 Alfa Romeo 156 (247 HP @ 6200 RPM) has 129 more horse power than 2006 Opel Signum. (118 HP @ 4000 RPM). In normal driving conditions, 2003 Alfa Romeo 156 should accelerate faster than 2006 Opel Signum. With that said, vehicle weight also plays an important factor in acceleration. 2006 Opel Signum weights approximately 80 kg more than 2003 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 Alfa Romeo 156 (306 Nm @ 4800 RPM) has 25 more torque (in Nm) than 2006 Opel Signum. (281 Nm @ 2000 RPM). This means 2003 Alfa Romeo 156 will have an easier job in driving up hills or pulling heavy equipment than 2006 Opel Signum.
Compare all specifications:
| 2003 Alfa Romeo 156 | 2006 Opel Signum | |
| Make | Alfa Romeo | Opel |
| Model | 156 | Signum |
| Year Released | 2003 | 2006 |
| Body Type | Station Wagon | Hatchback |
| Engine Position | Front | Front |
| Engine Size | 3179 cc | 1910 cc |
| Engine Cylinders | 6 cylinders | 4 cylinders |
| Engine Type | V | in-line |
| Valves per Cylinder | 4 valves | 2 valves |
| Horse Power | 247 HP | 118 HP |
| Engine RPM | 6200 RPM | 4000 RPM |
| Torque | 306 Nm | 281 Nm |
| Torque RPM | 4800 RPM | 2000 RPM |
| Fuel Type | Gasoline - Premium | Diesel |
| Top Speed | 245 km/hour | 191 km/hour |
| Drive Type | Front | Front |
| Transmission Type | Manual | Manual |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 5 doors | 5 doors |
| Vehicle Weight | 1535 kg | 1615 kg |
| Vehicle Length | 4450 mm | 4640 mm |
| Vehicle Width | 1750 mm | 1800 mm |
| Vehicle Height | 1400 mm | 1470 mm |
| Wheelbase Size | 2550 mm | 2840 mm |
| Fuel Consumption Overall | 12.3 L/100km | 6 L/100km |
| Fuel Tank Capacity | 63 L | 60 L |
