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 2,492 cc (6 cylinders), 2002 Alfa Romeo 156 is equipped with a bigger engine. In terms of performance, 2002 Alfa Romeo 156 (189 HP @ 6300 RPM) has 36 more horse power than 2003 Opel Vectra. (153 HP @ 5600 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 80 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 (229 Nm @ 3800 RPM) has 11 more torque (in Nm) than 2002 Alfa Romeo 156. (218 Nm @ 5000 RPM). This means 2003 Opel Vectra will have an easier job in driving up hills or pulling heavy equipment than 2002 Alfa Romeo 156.
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 | 2492 cc | 2172 cc |
| Engine Cylinders | 6 cylinders | 4 cylinders |
| Engine Type | V | in-line |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 189 HP | 153 HP |
| Engine RPM | 6300 RPM | 5600 RPM |
| Torque | 218 Nm | 229 Nm |
| Torque RPM | 5000 RPM | 3800 RPM |
| Engine Bore Size | 88 mm | 86 mm |
| Engine Stroke Size | 68.3 mm | 94.6 mm |
| Engine Compression Ratio | 10.3:1 | 9.5:1 |
| Fuel Type | Gasoline - Premium | Gasoline |
| Drive Type | Front | Front |
| Number of Seats | 5 seats | 5 seats |
| Vehicle Weight | 1430 kg | 1510 kg |
| Vehicle Length | 4440 mm | 4830 mm |
| Vehicle Width | 1750 mm | 1800 mm |
| Vehicle Height | 1400 mm | 1510 mm |
