With uncertainty looming over Red Bull’s next move, Renault looks to have kept up with Honda’s rate of progress.

Red Bull’s Dr Helmut Marko said after Montreal that Honda, Toro Rosso’s engine partner, stepped forward to the tune of “three tenths” in Canada.

But Renault, willing to remain Red Bull’s engine supplier beyond 2018, says it also improved.

“The improvement since Melbourne has been three tenths, including 1 tenth thanks to new fuel introduced in Barcelona,” Remi Taffin told France’s Auto Hebdo.

“It is the equivalent of about 20hp, which is in line with our expectations.

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