2004 Opel Signum vs. 2004 Alfa Romeo 156
To start off, both 2004 Opel Signum and 2004 Alfa Romeo 156 were released in the same year (2004). Therefore the support and the availability on parts for both vehicles should be relatively similar. At 3,177 cc (6 cylinders), 2004 Alfa Romeo 156 is equipped with a bigger engine. In terms of performance, 2004 Alfa Romeo 156 (238 HP @ 6200 RPM) has 90 more horse power than 2004 Opel Signum. (148 HP @ 4000 RPM) In normal driving conditions, 2004 Alfa Romeo 156 should accelerate faster than 2004 Opel Signum. With that said, vehicle weight also plays an important factor in acceleration. 2004 Opel Signum weights approximately 125 kg more than 2004 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, 2004 Opel Signum (326 Nm @ 2000 RPM) has 37 more torque (in Nm) than 2004 Alfa Romeo 156. (289 Nm @ 4800 RPM). This means 2004 Opel Signum will have an easier job in driving up hills or pulling heavy equipment than 2004 Alfa Romeo 156. 2004 Alfa Romeo 156 has automatic transmission and 2004 Opel Signum has manual transmission. 2004 Opel Signum will offer better control over acceleration and deceleration in addition to better fuel efficiency overall. 2004 Alfa Romeo 156 will be easier to drive especially in heavy traffic.
Compare all specifications:
| 2004 Opel Signum | 2004 Alfa Romeo 156 | |
| Make | Opel | Alfa Romeo |
| Model | Signum | 156 |
| Year Released | 2004 | 2004 |
| Body Type | Hatchback | Sedan |
| Engine Position | Front | Front |
| Engine Size | 1908 cc | 3177 cc |
| Engine Cylinders | 4 cylinders | 6 cylinders |
| Engine Type | in-line | V |
| Valves per Cylinder | 2 valves | 4 valves |
| Horse Power | 148 HP | 238 HP |
| Engine RPM | 4000 RPM | 6200 RPM |
| Torque | 326 Nm | 289 Nm |
| Torque RPM | 2000 RPM | 4800 RPM |
| Engine Bore Size | 82 mm | 93 mm |
| Engine Stroke Size | 90.4 mm | 78 mm |
| Engine Compression Ratio | 18.0:1 | 10.5:1 |
| Fuel Type | Diesel | Gasoline - Premium |
| Top Speed | 209 km/hour | 250 km/hour |
| Acceleration 0-100mph | 10.5 seconds | 6.3 seconds |
| Drive Type | Front | Front |
| Transmission Type | Manual | Automatic |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 5 doors | 4 doors |
| Vehicle Weight | 1610 kg | 1485 kg |
| Vehicle Length | 4640 mm | 4440 mm |
| Vehicle Width | 1800 mm | 1770 mm |
| Vehicle Height | 1470 mm | 1410 mm |
| Wheelbase Size | 2840 mm | 2600 mm |
| Fuel Consumption Overall | 6.1 L/100km | 12.1 L/100km |
| Fuel Tank Capacity | 60 L | 63 L |
