It's a nissan engine.....
I know wiki isn't entirely reliable but look at the list of cars they appear in. Does it look like it was developed by renault?
http://en.wikipedia.org/wiki/Nissan_VQ_engine
and taken from here
http://en.wikipedia.org/wiki/List_of_Renault_engines
Main article: Nissan VQ engine
The V engine is Renault's internal designation for the Nissan VQ engine, an overhead camshaft V6 used in the Vel Satis sedan and Espace minivan. The V designation is also used for an unrelated diesel V6 engine jointly developed by Renault and Nissan, used in the Renault Laguna coupé and designated V9X.
* V4Y: 3498 cc
* V9X: 2993 cc