Adrian Newey believes F1 is in "grave danger" of being hurt by its own regulations due to the engine freezes.

Red Bull has struggled relative to Mercedes this season with the dominant difference between the two teams coming from their power units. While Renault has had a tough start, it can only make small improvements after the engine hardware had to be frozen pre-season, and Newey believes that could lead to a situation where one team's advantage is locked in in future.

"The current set of regulations are engine orientated," Newey said. "At some point in the coming years presumably that will settle down. There is a grave danger, with the freeze happening progressively over the next 18 months, it's not apparent if one manufacturer ends up with an advantage as to what happens at that point.

"Is that advantage maintained for ever more, in which case the rest of us give up? It doesn't seem to me to be a particularly satisfactory situation at the moment. The regulations need more of a fundamental re-think in my opinion."

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Questioned on how strong believes the current RB10 - which won last time out in Canada - to be despite the engine deficit, Newey replied: "It's a pretty decent car."

And asked if it was the best chassis he had produced, Newey said: "Crikey! That's a difficult one to say.

"All we can do is from the sound overloads and so forth, we can effectively create the speed trace around the lap at all the circuits we go to, then compare that with our rivals.

"Generally speaking it looks competitive in the cornering areas, but less competitive on the straights unfortunately."