2004 Opel Signum vs. 2005 Alfa Romeo 147
To start off, 2005 Alfa Romeo 147 is newer by 1 year(s). Which means there will be less support and parts availability for 2004 Opel Signum. In addition, the cost of maintenance, including insurance, on 2004 Opel Signum 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 25 more horse power than 2005 Alfa Romeo 147. (148 HP @ 4000 RPM). In normal driving conditions, 2004 Opel Signum should accelerate faster than 2005 Alfa Romeo 147. With that said, vehicle weight also plays an important factor in acceleration. 2004 Opel Signum weights approximately 195 kg more than 2005 Alfa Romeo 147. 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, 2005 Alfa Romeo 147 (300 Nm @ 2000 RPM) has 35 more torque (in Nm) than 2004 Opel Signum. (265 Nm @ 2500 RPM). This means 2005 Alfa Romeo 147 will have an easier job in driving up hills or pulling heavy equipment than 2004 Opel Signum. 2005 Alfa Romeo 147 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. 2005 Alfa Romeo 147 will be easier to drive especially in heavy traffic.
Compare all specifications:
| 2004 Opel Signum | 2005 Alfa Romeo 147 | |
| Make | Opel | Alfa Romeo |
| Model | Signum | 147 |
| Year Released | 2004 | 2005 |
| Engine Position | Front | Front |
| Engine Size | 1995 cc | 1968 cc |
| Engine Cylinders | 4 cylinders | 4 cylinders |
| Engine Type | in-line | in-line |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 173 HP | 148 HP |
| Engine RPM | 5500 RPM | 4000 RPM |
| Torque | 265 Nm | 300 Nm |
| Torque RPM | 2500 RPM | 2000 RPM |
| Engine Bore Size | 86 mm | 82 mm |
| Engine Stroke Size | 86 mm | 90.4 mm |
| Engine Compression Ratio | 9.5:1 | 18.5:1 |
| Fuel Type | Gasoline - Premium | Diesel |
| Top Speed | 220 km/hour | 208 km/hour |
| Drive Type | Front | Front |
| Transmission Type | Manual | Automatic |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 5 doors | 3 doors |
| Vehicle Weight | 1560 kg | 1365 kg |
| Vehicle Length | 4640 mm | 4180 mm |
| Vehicle Width | 1800 mm | 1740 mm |
| Vehicle Height | 1470 mm | 1430 mm |
| Wheelbase Size | 2840 mm | 2550 mm |
| Fuel Consumption Overall | 9.4 L/100km | 5.9 L/100km |
| Fuel Tank Capacity | 60 L | 60 L |
