You are right.
It's projet 114, it had a new v6 2.2 litre engine.
Yes, and I was wrong as well because it was not part of the project which became the R16!
Projet 114 was in fact the replacement for the Fregate but after 14 prototypes were made (starting with a Ghia proposal from 1958) it was eventually abandoned and Projet 115, which culminated in the R16, was started!
Anyway you got there so it's another point!