2005 Alfa Romeo 159 vs. 2004 Opel Signum
To start off, 2005 Alfa Romeo 159 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 3,175 cc (6 cylinders), 2005 Alfa Romeo 159 is equipped with a bigger engine. In terms of performance, 2005 Alfa Romeo 159 (247 HP @ 6200 RPM) has 74 more horse power than 2004 Opel Signum. (173 HP @ 5500 RPM). In normal driving conditions, 2005 Alfa Romeo 159 should accelerate faster than 2004 Opel Signum. With that said, vehicle weight also plays an important factor in acceleration. 2005 Alfa Romeo 159 weights approximately 180 kg more than 2004 Opel Signum. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 2005 Alfa Romeo 159 is four wheel drive (4WD), it will have significant more traction and grip than 2004 Opel Signum. In wet, icy, snow, or gravel driving conditions, 2005 Alfa Romeo 159 will offer significantly more control. 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 159 (322 Nm @ 4500 RPM) has 57 more torque (in Nm) than 2004 Opel Signum. (265 Nm @ 2500 RPM). This means 2005 Alfa Romeo 159 will have an easier job in driving up hills or pulling heavy equipment than 2004 Opel Signum.
Compare all specifications:
| 2005 Alfa Romeo 159 | 2004 Opel Signum | |
| Make | Alfa Romeo | Opel |
| Model | 159 | Signum |
| Year Released | 2005 | 2004 |
| Body Type | Sedan | Hatchback |
| Engine Position | Front | Front |
| Engine Size | 3175 cc | 1995 cc |
| Engine Cylinders | 6 cylinders | 4 cylinders |
| Engine Type | V | in-line |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 247 HP | 173 HP |
| Engine RPM | 6200 RPM | 5500 RPM |
| Torque | 322 Nm | 265 Nm |
| Torque RPM | 4500 RPM | 2500 RPM |
| Engine Bore Size | 87.5 mm | 86 mm |
| Engine Stroke Size | 88 mm | 86 mm |
| Engine Compression Ratio | 11.3:1 | 9.5:1 |
| Top Speed | 240 km/hour | 220 km/hour |
| Drive Type | 4WD | Front |
| Transmission Type | Manual | Manual |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 4 doors | 5 doors |
| Vehicle Weight | 1740 kg | 1560 kg |
| Vehicle Length | 4670 mm | 4640 mm |
| Vehicle Width | 1830 mm | 1800 mm |
| Vehicle Height | 1420 mm | 1470 mm |
| Wheelbase Size | 2710 mm | 2840 mm |
| Fuel Consumption Overall | 11.7 L/100km | 9.4 L/100km |
| Fuel Tank Capacity | 70 L | 60 L |
