Re: alfa 155 n/s brake caliper problem
The rear caliper from 156 does fit, however, a slight modification has to be done. The caliper on 155 is orientated at aprox. 4 o´clock while on 156 it´s on 9 o´clock. Because of that the lug for the handbrakewire has to be twisted 180 dgr. and there must be drilled and tapered new threads(M6) for it in the caliper. You will see this easily after you have fitted the 156 caliper.
After this mod. it seems like the brakes has become slightly better, afterall it´s bit larger brakepads on the 156.