Originally Posted by
AnttiL
Let me try to put it better
Rally1 - RC1 - WRC cars - WRC title for drivers and manufacturers
Rally2 - RC2 - R5 & R4 cars, previously S2000 N4 cars - WRC2, WRC3, ERC, national & regional championship titles
Rally3 - something to be introduced later, something like R2 with 4WD
Rally4 - RC4 - R2 cars - JWRC, national & regional championship titles
Rally5 - RC5 - R1 cars
A part of the confusion is in the FIA support class. Until 2018 there was WRC2 for R5 cars and WRC3 for FWD cars (only like three drivers took part in it apart from JWRC drivers). In 2019 WRC2 was split in two, with WRC2Pro (for factory entries) and WRC2 (for privateers). For 2020 these were relabeled as WRC2 for teams (factory or private) and WRC3 for privateers.