as above, check the specs for the car - either the sticker on the car when you open the driver's door, near the striker plate/door lock - or the manual. it will specify the 'minimum' requirement:
*speed rating: likely a minimum of V, which makes W/Y/Z better
*load index: likely around 87, so anything higher is better and obviously adequate
you can choose higher specs than required. some trade-off can be cost, and also ride comfort, cos the higher-spec'd tyres are often stiffer. plus, the RE050 is already a stiff-walled tyre, so if it's not what you have now, expect a firmer/harder ride.
in general, the RE050 comes as:
*run-flat: not what you need
alfa's have typically been spec'd (as factory tyres in some countries) with the symmetrical version (non-run flat).
asymmetrical is becoming more popular (again) these days. but you are very unlikely to notice any difference, except maybe the noise. asymmetrical may be a bit quieter, but that's a generalisation.
i suspect the 87V spec tyre is ideal for the car.