Ref peinture RAL engine

[geni]

qui peu indiquer la référence RAL de la couleur "gris Ferguson sur nos moteurs TwinCam
which can indicate the RAL reference of the colour "Ferguson grey" on our TwinCam engines

[elans3]

The Ferguson Grey is not a RAL number. the RAL designations are more architectural and domestic than auto derived colours. It is "close" to RAL 7470, maybe near enough for you, but if you want it to be spot-on, try Ferguson Stoneleigh Grey, or Ferguson Grey, Du Pont code 652.
HTH