Quote Originally Posted by WRCStan View Post
Maybe so on the stages, are you saying it can't technically be Rally3? This is legal documentation speak so somebody had to have the incentive to argue for and/or decide that limit on paper in Rally3 regulations else why not just call it 1600? It can't have been Ford or the existing R2/Rally4s asking.
I probably didn't understand your post properly.

The specific limit 1620 ccm instead of 1600 ccm is old. It goes roughly ten years back to R3T when the limit was enlarged to allow Renault to homologate the Clio. Since that time that value naturally migrated to every other 1600 ccm class because same engines have been used in all of them (except most of the WRC with purpose-built units).