2004 Alfa Romeo 156 vs. 2003 Opel Vectra
To start off, 2004 Alfa Romeo 156 is newer by 1 year(s). Which means there will be less support and parts availability for 2003 Opel Vectra. In addition, the cost of maintenance, including insurance, on 2003 Opel Vectra would be higher. At 1,998 cc (4 cylinders), 2003 Opel Vectra is equipped with a bigger engine. In terms of performance, 2004 Alfa Romeo 156 (113 HP @ 4000 RPM) has 14 more horse power than 2003 Opel Vectra. (99 HP @ 4400 RPM). In normal driving conditions, 2004 Alfa Romeo 156 should accelerate faster than 2003 Opel Vectra. With that said, vehicle weight also plays an important factor in acceleration. 2003 Opel Vectra weights approximately 90 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 Alfa Romeo 156 (275 Nm @ 2000 RPM) has 54 more torque (in Nm) than 2003 Opel Vectra. (221 Nm @ 1950 RPM). This means 2004 Alfa Romeo 156 will have an easier job in driving up hills or pulling heavy equipment than 2003 Opel Vectra.
Compare all specifications:
| 2004 Alfa Romeo 156 | 2003 Opel Vectra | |
| Make | Alfa Romeo | Opel |
| Model | 156 | Vectra |
| Year Released | 2004 | 2003 |
| Engine Position | Front | Front |
| Engine Size | 1969 cc | 1998 cc |
| Engine Cylinders | 4 cylinders | 4 cylinders |
| Engine Type | in-line | in-line |
| Valves per Cylinder | 2 valves | 4 valves |
| Horse Power | 113 HP | 99 HP |
| Engine RPM | 4000 RPM | 4400 RPM |
| Torque | 275 Nm | 221 Nm |
| Torque RPM | 2000 RPM | 1950 RPM |
| Engine Bore Size | 82 mm | 84 mm |
| Engine Stroke Size | 90.4 mm | 90 mm |
| Top Speed | 191 km/hour | 188 km/hour |
| Acceleration 0-100mph | 10.3 seconds | 13.5 seconds |
| Drive Type | Front | Front |
| Transmission Type | Manual | Manual |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 4 doors | 5 doors |
| Vehicle Weight | 1405 kg | 1495 kg |
| Vehicle Length | 4440 mm | 4830 mm |
| Vehicle Width | 1750 mm | 1800 mm |
| Vehicle Height | 1400 mm | 1510 mm |
| Wheelbase Size | 2550 mm | 2640 mm |
| Fuel Consumption Overall | 5.8 L/100km | 5.9 L/100km |
| Fuel Tank Capacity | 63 L | 60 L |
