2004 Opel Signum vs. 1999 Alfa Romeo 156
To start off, 2004 Opel Signum is newer by 5 year(s). Which means there will be less support and parts availability for 1999 Alfa Romeo 156. In addition, the cost of maintenance, including insurance, on 1999 Alfa Romeo 156 would be higher. At 1,995 cc (4 cylinders), 2004 Opel Signum is equipped with a bigger engine. In terms of performance, 2004 Opel Signum (173 HP @ 5500 RPM) has 69 more horse power than 1999 Alfa Romeo 156. (104 HP @ 4000 RPM). In normal driving conditions, 2004 Opel Signum should accelerate faster than 1999 Alfa Romeo 156. With that said, vehicle weight also plays an important factor in acceleration. 2004 Opel Signum weights approximately 290 kg more than 1999 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, 2004 Opel Signum (265 Nm @ 2500 RPM) has 10 more torque (in Nm) than 1999 Alfa Romeo 156. (255 Nm @ 2000 RPM). This means 2004 Opel Signum will have an easier job in driving up hills or pulling heavy equipment than 1999 Alfa Romeo 156.
Compare all specifications:
| 2004 Opel Signum | 1999 Alfa Romeo 156 | |
| Make | Opel | Alfa Romeo |
| Model | Signum | 156 |
| Year Released | 2004 | 1999 |
| Body Type | Hatchback | Station Wagon |
| Engine Position | Front | Front |
| Engine Size | 1995 cc | 1910 cc |
| Engine Cylinders | 4 cylinders | 4 cylinders |
| Engine Type | in-line | in-line |
| Valves per Cylinder | 4 valves | 2 valves |
| Horse Power | 173 HP | 104 HP |
| Engine RPM | 5500 RPM | 4000 RPM |
| Torque | 265 Nm | 255 Nm |
| Torque RPM | 2500 RPM | 2000 RPM |
| Engine Bore Size | 86 mm | 82.6 mm |
| Engine Stroke Size | 86 mm | 90 mm |
| Fuel Type | Gasoline - Premium | Diesel |
| Drive Type | Front | Front |
| Transmission Type | Manual | Manual |
| Number of Doors | 5 doors | 5 doors |
| Vehicle Weight | 1560 kg | 1270 kg |
| Vehicle Length | 4640 mm | 4440 mm |
| Vehicle Width | 1800 mm | 1750 mm |
| Vehicle Height | 1470 mm | 1420 mm |
| Wheelbase Size | 2840 mm | 2600 mm |
| Fuel Tank Capacity | 60 L | 63 L |
