Surf - maybe it would fit, or maybe it wouldn't, but the Europa came with the lighter Cléon-Alu engine. Fonte means cast iron, in this context. I guess the R5 got the Fonte engine because it was a cheap car, while the R16, R17 etc. got the Alu engine because they were more expensive. I reckon the Fuego turbo engine would be a better swap for a Renault engined Europa.