1991 Alfa Romeo SZ vs. 2003 Opel Vectra
To start off, 2003 Opel Vectra is newer by 12 year(s). Which means there will be less support and parts availability for 1991 Alfa Romeo SZ. In addition, the cost of maintenance, including insurance, on 1991 Alfa Romeo SZ would be higher. At 2,959 cc (6 cylinders), 1991 Alfa Romeo SZ is equipped with a bigger engine. In terms of performance, 1991 Alfa Romeo SZ (208 HP @ 6200 RPM) has 32 more horse power than 2003 Opel Vectra. (176 HP @ 4000 RPM). In normal driving conditions, 1991 Alfa Romeo SZ should accelerate faster than 2003 Opel Vectra. With that said, vehicle weight also plays an important factor in acceleration. 2003 Opel Vectra weights approximately 330 kg more than 1991 Alfa Romeo SZ.
Because 1991 Alfa Romeo SZ is rear wheel drive (RWD), it offers better handling in dry conditions; in addition, if you are looking to drift, it will be much easier to do with 1991 Alfa Romeo SZ. However, in wet, icy, snow, or gravel driving conditions, 2003 Opel Vectra, being front wheel drive (FWD), will offer much better control with better grip. 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 (370 Nm @ 1900 RPM) has 125 more torque (in Nm) than 1991 Alfa Romeo SZ. (245 Nm @ 4500 RPM). This means 2003 Opel Vectra will have an easier job in driving up hills or pulling heavy equipment than 1991 Alfa Romeo SZ.
Compare all specifications:
| 1991 Alfa Romeo SZ | 2003 Opel Vectra | |
| Make | Alfa Romeo | Opel |
| Model | SZ | Vectra |
| Year Released | 1991 | 2003 |
| Engine Position | Front | Front |
| Engine Size | 2959 cc | 2958 cc |
| Engine Cylinders | 6 cylinders | 6 cylinders |
| Engine Type | in-line | V |
| Valves per Cylinder | 2 valves | 4 valves |
| Horse Power | 208 HP | 176 HP |
| Engine RPM | 6200 RPM | 4000 RPM |
| Torque | 245 Nm | 370 Nm |
| Torque RPM | 4500 RPM | 1900 RPM |
| Engine Bore Size | 93 mm | 87.5 mm |
| Engine Stroke Size | 72.6 mm | 82 mm |
| Engine Compression Ratio | 10.0:1 | 18.5:1 |
| Fuel Type | Gasoline | Gasoline |
| Drive Type | Rear | Front |
| Transmission Type | Manual | Manual |
| Number of Seats | 2 seats | 5 seats |
| Vehicle Weight | 1260 kg | 1590 kg |
| Vehicle Length | 4670 mm | 4830 mm |
| Vehicle Width | 1740 mm | 1800 mm |
| Vehicle Height | 1320 mm | 1510 mm |
