Quote Originally Posted by Matra et Alpine
I've asked the R5 experts in the Alpine club. Some of these guys copmeted in them and still do on the classics, so I'm expecting a definitive answer from them.
Given that Renault are French I woudln't put it past there to be a little cheating or bending of the rules causing the confusion As there is ONE Q re the book you cited -- the "Tour de Corse" model was already built to compete and was homologated to run against the GroupB NOT Group4 cars .

I'll take the definitive answer when some of the French members of Club Alpine respond to me query. One of them is liekly to even give us engine numbers fomr his car to prove it

At least no one can say we haven't done our homework.
I have here and old 1985 portuguese motorsport annuary. It confirms the 1597 number but, as you said, it is no more a question of confirmation of numbers cause we all know now that all those engines probably existed.

That friend of yours answer will be accepted as the official tie-breaker!

Have a nice weekend!