1991 Alfa Romeo SZ vs. 2005 BMW X3
To start off, 2005 BMW X3 is newer by 14 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 2,977 cc (6 cylinders), 2005 BMW X3 is equipped with a bigger engine. In terms of performance, 1991 Alfa Romeo SZ (208 HP @ 6200 RPM) has 24 more horse power than 2005 BMW X3. (184 HP @ 4000 RPM). In normal driving conditions, 1991 Alfa Romeo SZ should accelerate faster than 2005 BMW X3. With that said, vehicle weight also plays an important factor in acceleration. 2005 BMW X3 weights approximately 665 kg more than 1991 Alfa Romeo SZ.
Because 2005 BMW X3 is four wheel drive (4WD), it will have significant more traction and grip than 1991 Alfa Romeo SZ. In wet, icy, snow, or gravel driving conditions, 2005 BMW X3 will offer significantly more control. 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 BMW X3 (420 Nm @ 1500 RPM) has 175 more torque (in Nm) than 1991 Alfa Romeo SZ. (245 Nm @ 4500 RPM). This means 2005 BMW X3 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 | 2005 BMW X3 | |
| Make | Alfa Romeo | BMW |
| Model | SZ | X3 |
| Year Released | 1991 | 2005 |
| Engine Position | Front | Front |
| Engine Size | 2959 cc | 2977 cc |
| Engine Cylinders | 6 cylinders | 6 cylinders |
| Engine Type | in-line | in-line |
| Valves per Cylinder | 2 valves | 4 valves |
| Horse Power | 208 HP | 184 HP |
| Engine RPM | 6200 RPM | 4000 RPM |
| Torque | 245 Nm | 420 Nm |
| Torque RPM | 4500 RPM | 1500 RPM |
| Engine Bore Size | 93 mm | 84 mm |
| Engine Stroke Size | 72.6 mm | 90 mm |
| Engine Compression Ratio | 10.0:1 | 17.0:1 |
| Fuel Type | Gasoline | Diesel |
| Top Speed | 233 km/hour | 210 km/hour |
| Drive Type | Rear | 4WD |
| Number of Seats | 2 seats | 5 seats |
| Number of Doors | 4 doors | 5 doors |
| Vehicle Weight | 1260 kg | 1925 kg |
| Vehicle Length | 4670 mm | 4570 mm |
| Vehicle Width | 1740 mm | 1860 mm |
| Vehicle Height | 1320 mm | 1680 mm |
| Wheelbase Size | 2520 mm | 2830 mm |
| Fuel Tank Capacity | 50 L | 67 L |
