2002 Alfa Romeo 156 vs. 2003 Opel Vectra
To start off, 2003 Opel Vectra is newer by 1 year(s). Which means there will be less support and parts availability for 2002 Alfa Romeo 156. In addition, the cost of maintenance, including insurance, on 2002 Alfa Romeo 156 would be higher. At 3,177 cc (6 cylinders), 2002 Alfa Romeo 156 is equipped with a bigger engine. In terms of performance, 2002 Alfa Romeo 156 (247 HP @ 6000 RPM) has 122 more horse power than 2003 Opel Vectra. (125 HP @ 4000 RPM). In normal driving conditions, 2002 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 130 kg more than 2002 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, 2002 Alfa Romeo 156 (305 Nm @ 4800 RPM) has 25 more torque (in Nm) than 2003 Opel Vectra. (280 Nm @ 1500 RPM). This means 2002 Alfa Romeo 156 will have an easier job in driving up hills or pulling heavy equipment than 2003 Opel Vectra.
Compare all specifications:
| 2002 Alfa Romeo 156 | 2003 Opel Vectra | |
| Make | Alfa Romeo | Opel |
| Model | 156 | Vectra |
| Year Released | 2002 | 2003 |
| Engine Position | Front | Front |
| Engine Size | 3177 cc | 2169 cc |
| Engine Cylinders | 6 cylinders | 4 cylinders |
| Engine Type | V | in-line |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 247 HP | 125 HP |
| Engine RPM | 6000 RPM | 4000 RPM |
| Torque | 305 Nm | 280 Nm |
| Torque RPM | 4800 RPM | 1500 RPM |
| Engine Bore Size | 93 mm | 84 mm |
| Engine Stroke Size | 78 mm | 98 mm |
| Engine Compression Ratio | 10.5:1 | 10.5:1 |
| Fuel Type | Gasoline | Diesel |
| Drive Type | Front | Front |
| Transmission Type | Manual | Manual |
| Number of Seats | 5 seats | 5 seats |
| Vehicle Weight | 1430 kg | 1560 kg |
| Vehicle Length | 4450 mm | 4830 mm |
| Vehicle Width | 1750 mm | 1800 mm |
| Vehicle Height | 1420 mm | 1510 mm |
