First of all, AC performance of a car is not related to its engine CC. Compressor needs a fixed amount of threshold HP which can be provided by any engine producing enough power. Secondly, paksuzuki has done a good job in alto by designing thin fin condenser that dissipates heat pretty easily. I have both pkdm wagonR 2018 model (33k driven) and pkdm alto vxr, on a hot sunny day altos ac outperforms wagonR
s ac in cooling affect. WagonR has better blower throw though, maybe due to lack of cabin filter. AC in alto definitely performs better than ac in jdm 660s