2005 Alfa Romeo 156 vs. 2004 Opel Vectra
To start off, 2005 Alfa Romeo 156 is newer by 1 year(s). Which means there will be less support and parts availability for 2004 Opel Vectra. In addition, the cost of maintenance, including insurance, on 2004 Opel Vectra would be higher. At 3,179 cc (6 cylinders), 2005 Alfa Romeo 156 is equipped with a bigger engine. In terms of performance, 2005 Alfa Romeo 156 (247 HP @ 6200 RPM) has 127 more horse power than 2004 Opel Vectra. (120 HP @ 6000 RPM). In normal driving conditions, 2005 Alfa Romeo 156 should accelerate faster than 2004 Opel Vectra. With that said, vehicle weight also plays an important factor in acceleration. 2005 Alfa Romeo 156 weights approximately 165 kg more than 2004 Opel Vectra. 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 156 (305 Nm @ 4800 RPM) has 138 more torque (in Nm) than 2004 Opel Vectra. (167 Nm @ 3800 RPM). This means 2005 Alfa Romeo 156 will have an easier job in driving up hills or pulling heavy equipment than 2004 Opel Vectra.
Compare all specifications:
| 2005 Alfa Romeo 156 | 2004 Opel Vectra | |
| Make | Alfa Romeo | Opel |
| Model | 156 | Vectra |
| Year Released | 2005 | 2004 |
| Engine Position | Front | Front |
| Engine Size | 3179 cc | 1796 cc |
| Engine Cylinders | 6 cylinders | 4 cylinders |
| Engine Type | V | in-line |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 247 HP | 120 HP |
| Engine RPM | 6200 RPM | 6000 RPM |
| Torque | 305 Nm | 167 Nm |
| Torque RPM | 4800 RPM | 3800 RPM |
| Engine Compression Ratio | 10.5:1 | 10.5:1 |
| Top Speed | 250 km/hour | 205 km/hour |
| Acceleration 0-100mph | 6.6 seconds | 11.2 seconds |
| Drive Type | Front | Front |
| Transmission Type | Manual | Manual |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 5 doors | 5 doors |
| Vehicle Weight | 1540 kg | 1375 kg |
| Wheelbase Size | 2550 mm | 2640 mm |
| Fuel Consumption Overall | 12.1 L/100km | 8.1 L/100km |
| Fuel Tank Capacity | 60 L | 61 L |
