Does the sister team of RBR run renault too? or ferrari?
Would RBR dump renault mid season if its a disaster? merc engines in the back?
Very unlikely for a few reasons, one of which being that another engine probably wouldn’t fit without a massive re-design.
People also seem to be forgetting that Renault have an amazing history in F1, I would be wary of under-estimating them.
Also Renault have been very helpful to RB with their engines over the last few years, mapping tricks, off throttle blowing etc. Can’t imagine merc or ferrari being to helpful to them in the same way. Honda maybe in 2015 though.