I dunno for sure, but...
Alfa, like Fiat, USUALLY had their own bolt pattern.
The world uses 4 x 100 and 4 x 110.
Fiat uses 4 x 98 and Alfa... I believe is 4 x 108!
In some cases some folks have FORCED the wheels to fit, or used wobble-bolts. Some advocate redrilling hubs and rotors, I like ADAPTERS...
As for bolting on directly, usually NO!