1991 Alfa Romeo SZ vs. 2009 Porsche 911
To start off, 2009 Porsche 911 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 3,823 cc (6 cylinders), 2009 Porsche 911 is equipped with a bigger engine. In terms of performance, 2009 Porsche 911 (350 HP @ 6600 RPM) has 142 more horse power than 1991 Alfa Romeo SZ. (208 HP @ 6200 RPM) In normal driving conditions, 2009 Porsche 911 should accelerate faster than 1991 Alfa Romeo SZ. With that said, vehicle weight also plays an important factor in acceleration. 2009 Porsche 911 weights approximately 1170 kg more than 1991 Alfa Romeo SZ. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
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 Porsche 911 (400 Nm @ 4600 RPM) has 155 more torque (in Nm) than 1991 Alfa Romeo SZ. (245 Nm @ 4500 RPM). This means 2009 Porsche 911 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 Porsche 911 | |
| Make | Alfa Romeo | Porsche |
| Model | SZ | 911 |
| Year Released | 1991 | 2009 |
| Engine Position | Front | Rear |
| Engine Size | 2959 cc | 3823 cc |
| Engine Cylinders | 6 cylinders | 6 cylinders |
| Engine Type | in-line | boxer |
| Valves per Cylinder | 2 valves | 4 valves |
| Horse Power | 208 HP | 350 HP |
| Engine RPM | 6200 RPM | 6600 RPM |
| Torque | 245 Nm | 400 Nm |
| Torque RPM | 4500 RPM | 4600 RPM |
| Engine Bore Size | 93 mm | 96 mm |
| Engine Stroke Size | 72.6 mm | 82.8 mm |
| Fuel Type | Gasoline | Gasoline |
| Top Speed | 233 km/hour | 293 km/hour |
| Drive Type | Rear | Rear |
| Transmission Type | Manual | Manual |
| Number of Seats | 2 seats | 4 seats |
| Number of Doors | 4 doors | 2 doors |
| Vehicle Weight | 1260 kg | 2430 kg |
| Vehicle Length | 4670 mm | 4440 mm |
| Vehicle Width | 1740 mm | 1310 mm |
| Vehicle Height | 1320 mm | 1780 mm |
| Wheelbase Size | 2520 mm | 2360 mm |
| Fuel Tank Capacity | 50 L | 64 L |
