Meanwhile, the R4 GTL had received the version; the basic model retained its ancient "Billancourt" 845cc engine, but in 1986 the R4 was entirely C-engine powered, the base model receiving the unit. The new R18, which succeeded the R12, received the version of this engine, with a standard cylinder head, and several options for power specifications. It is in this capacity, but now in a transverse position, this unit found its way under the hood of the R9, (car of the year 1982) and its sister R11, then under the Super 5 in 1985.