efi makes a difference yes but not to sure but my rona being pre 86 and a 22re requires 97 ron fuel according to the manual that may make a difference too although not sure. Another thing not sure if the guy is off his nut but in a 2sc quarter mile post the 22re is listed as 98kw for a corona, he is either mistaken or the mag is wrong or maybe perhaps the 22re has 98kw i wish.