 At the same time, the bigger F4R is installed in the Laguna and Espace (third generation), the engine is the same size as the F7R as in the Clio Williams.It ends up also being installed in the second and third generation Mégane as well as the second Laguna.The specificity of F4P and F4R engines is that they have a 16-valve cylinder head, similar to the K4J and K4M versions of K-Type engine, over the F4P and F4R engines share the same distribution kit and even water pump that K-Type engine 16 valves (K4J and K4M).