Some Renault-powered F1 drivers could run out of engines later in 2014, the French supplier has admitted. Renault chief Rob White said the French marque’s recovery from its early-season struggle for power and reliability is still ongoing.

“At the first test we were miles off. We were in a crisis,” he admitted to Germany’s Auto Motor und Sport, “but we didn’t panic. “We set up a plan to close the gap. Since then we have made progress but unfortunately not quite enough,” White acknowledged.

And those efforts to end the crisis have had a price, he added. “Within the individual teams, we have consumed more components within the power unit than we had planned. It means that the teams are at different development cycles.

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