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 1,794 cc (4 cylinders), 2003 Opel Vectra is equipped with a bigger engine. In terms of performance, 2002 Alfa Romeo 156 (138 HP @ 6500 RPM) has 18 more horse power than 2003 Opel Vectra. (120 HP @ 5400 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 78 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, 2003 Opel Vectra (167 Nm @ 3800 RPM) has 4 more torque (in Nm) than 2002 Alfa Romeo 156. (163 Nm @ 3900 RPM). This means 2003 Opel Vectra will have an easier job in driving up hills or pulling heavy equipment than 2002 Alfa Romeo 156. 2003 Opel Vectra has automatic transmission and 2002 Alfa Romeo 156 has manual transmission. 2002 Alfa Romeo 156 will offer better control over acceleration and deceleration in addition to better fuel efficiency overall. 2003 Opel Vectra will be easier to drive especially in heavy traffic.
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 | 1747 cc | 1794 cc |
| Engine Cylinders | 4 cylinders | 4 cylinders |
| Engine Type | in-line | in-line |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 138 HP | 120 HP |
| Engine RPM | 6500 RPM | 5400 RPM |
| Torque | 163 Nm | 167 Nm |
| Torque RPM | 3900 RPM | 3800 RPM |
| Engine Bore Size | 82 mm | 80.5 mm |
| Engine Stroke Size | 82.7 mm | 88.2 mm |
| Drive Type | Front | Front |
| Transmission Type | Manual | Automatic |
| Number of Seats | 5 seats | 5 seats |
| Vehicle Weight | 1392 kg | 1470 kg |
| Vehicle Length | 4450 mm | 4830 mm |
| Vehicle Width | 1750 mm | 1800 mm |
| Vehicle Height | 1400 mm | 1510 mm |
