2005 Alfa Romeo 159 vs. 2003 Opel Signum
To start off, 2005 Alfa Romeo 159 is newer by 2 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 2,958 cc (6 cylinders), 2003 Opel Signum is equipped with a bigger engine. In terms of performance, 2005 Alfa Romeo 159 (197 HP @ 4000 RPM) has 23 more horse power than 2003 Opel Signum. (174 HP @ 4000 RPM). In normal driving conditions, 2005 Alfa Romeo 159 should accelerate faster than 2003 Opel Signum. With that said, vehicle weight also plays an important factor in acceleration. 2003 Opel Signum weights approximately 65 kg more than 2005 Alfa Romeo 159.
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 159 (385 Nm @ 2000 RPM) has 15 more torque (in Nm) than 2003 Opel Signum. (370 Nm @ 1900 RPM). This means 2005 Alfa Romeo 159 will have an easier job in driving up hills or pulling heavy equipment than 2003 Opel Signum. 2003 Opel Signum has automatic transmission and 2005 Alfa Romeo 159 has manual transmission. 2005 Alfa Romeo 159 will offer better control over acceleration and deceleration in addition to better fuel efficiency overall. 2003 Opel Signum will be easier to drive especially in heavy traffic.
Compare all specifications:
| 2005 Alfa Romeo 159 | 2003 Opel Signum | |
| Make | Alfa Romeo | Opel |
| Model | 159 | Signum |
| Year Released | 2005 | 2003 |
| Body Type | Sedan | Hatchback |
| Engine Position | Front | Front |
| Engine Size | 2387 cc | 2958 cc |
| Engine Cylinders | 5 cylinders | 6 cylinders |
| Engine Type | in-line | V |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 197 HP | 174 HP |
| Engine RPM | 4000 RPM | 4000 RPM |
| Torque | 385 Nm | 370 Nm |
| Torque RPM | 2000 RPM | 1900 RPM |
| Engine Bore Size | 82.1 mm | 87.6 mm |
| Engine Stroke Size | 90.4 mm | 82 mm |
| Engine Compression Ratio | 17.0:1 | 18.5:1 |
| Acceleration 0-100mph | 8.4 seconds | 9.9 seconds |
| Drive Type | Front | Front |
| Transmission Type | Manual | Automatic |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 4 doors | 5 doors |
| Vehicle Weight | 1630 kg | 1695 kg |
| Vehicle Length | 4670 mm | 4640 mm |
| Vehicle Width | 1830 mm | 1800 mm |
| Vehicle Height | 1420 mm | 1470 mm |
| Wheelbase Size | 2600 mm | 2710 mm |
| Fuel Consumption | 5.4 L/100km | 6 L/100km |
| Fuel Consumption City | 9.3 L/100km | 11.2 L/100km |
| Fuel Consumption Overall | 6.8 L/100km | 7.9 L/100km |
| Fuel Tank Capacity | 70 L | 60 L |
