1991 Alfa Romeo SZ vs. 2009 BMW 525
To start off, 2009 BMW 525 is newer by 18 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 33 more horse power than 2009 BMW 525. (175 HP @ 4000 RPM). In normal driving conditions, 1991 Alfa Romeo SZ should accelerate faster than 2009 BMW 525. With that said, vehicle weight also plays an important factor in acceleration. 2009 BMW 525 weights approximately 400 kg more than 1991 Alfa Romeo SZ.
Both vehicles are rear wheel drive (RWD) - it offers better handling in dry conditions; in addition, if you are looking to drift, both vehicles do the job better than front 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, 2009 BMW 525 (400 Nm @ 2000 RPM) has 155 more torque (in Nm) than 1991 Alfa Romeo SZ. (245 Nm @ 4500 RPM). This means 2009 BMW 525 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 | 2009 BMW 525 | |
| Make | Alfa Romeo | BMW |
| Model | SZ | 525 |
| Year Released | 1991 | 2009 |
| Engine Position | Front | Front |
| Engine Size | 2959 cc | 2497 cc |
| Engine Cylinders | 6 cylinders | 6 cylinders |
| Engine Type | in-line | in-line |
| Valves per Cylinder | 2 valves | 4 valves |
| Horse Power | 208 HP | 175 HP |
| Engine RPM | 6200 RPM | 4000 RPM |
| Torque | 245 Nm | 400 Nm |
| Torque RPM | 4500 RPM | 2000 RPM |
| Engine Bore Size | 93 mm | 84 mm |
| Engine Stroke Size | 72.6 mm | 75.1 mm |
| Engine Compression Ratio | 10.0:1 | 17.0:1 |
| Fuel Type | Gasoline | Diesel |
| Top Speed | 233 km/hour | 230 km/hour |
| Drive Type | Rear | Rear |
| Transmission Type | Manual | Manual |
| Number of Seats | 2 seats | 5 seats |
| Number of Doors | 4 doors | 4 doors |
| Vehicle Weight | 1260 kg | 1660 kg |
| Vehicle Length | 4670 mm | 4850 mm |
| Vehicle Width | 1740 mm | 1850 mm |
| Vehicle Height | 1320 mm | 1470 mm |
| Wheelbase Size | 2520 mm | 2890 mm |
| Fuel Tank Capacity | 50 L | 70 L |
