2004 Alfa Romeo 156 vs. 2003 Opel Signum
To start off, 2004 Alfa Romeo 156 is newer by 1 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 1,796 cc (4 cylinders), 2003 Opel Signum is equipped with a bigger engine. In terms of performance, 2003 Opel Signum (120 HP @ 6000 RPM) has 7 more horse power than 2004 Alfa Romeo 156. (113 HP @ 6200 RPM) In normal driving conditions, 2003 Opel Signum should accelerate faster than 2004 Alfa Romeo 156. With that said, vehicle weight also plays an important factor in acceleration. 2003 Opel Signum weights approximately 195 kg more than 2004 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 (166 Nm @ 3800 RPM) has 20 more torque (in Nm) than 2004 Alfa Romeo 156. (146 Nm @ 4500 RPM). This means 2003 Opel Signum will have an easier job in driving up hills or pulling heavy equipment than 2004 Alfa Romeo 156.
Compare all specifications:
| 2004 Alfa Romeo 156 | 2003 Opel Signum | |
| Make | Alfa Romeo | Opel |
| Model | 156 | Signum |
| Year Released | 2004 | 2003 |
| Body Type | Station Wagon | Hatchback |
| Engine Position | Front | Front |
| Engine Size | 1598 cc | 1796 cc |
| Engine Cylinders | 4 cylinders | 4 cylinders |
| Engine Type | in-line | in-line |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 113 HP | 120 HP |
| Engine RPM | 6200 RPM | 6000 RPM |
| Torque | 146 Nm | 166 Nm |
| Torque RPM | 4500 RPM | 3800 RPM |
| Engine Compression Ratio | 10.3:1 | 10.5:1 |
| Fuel Type | Gasoline | Gasoline - Premium |
| Top Speed | 195 km/hour | 197 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 | 1340 kg | 1535 kg |
| Vehicle Length | 4450 mm | 4640 mm |
| Vehicle Width | 1750 mm | 1800 mm |
| Vehicle Height | 1440 mm | 1470 mm |
| Wheelbase Size | 2600 mm | 2840 mm |
| Fuel Consumption Highway | 6.5 L/100km | 6.3 L/100km |
| Fuel Consumption City | 11.5 L/100km | 11.3 L/100km |
| Fuel Consumption Overall | 7.5 L/100km | 8.1 L/100km |
| Fuel Tank Capacity | 63 L | 60 L |
