Whilst Renault's power unit enjoyed its best day yet, having completed just over 200 laps in the back of its customers cars, Kamui Kobayashi says it's unable to compete with Ferrari and Mercedes' units. The Caterham driver was the fastest of the Renault powered cars, posting a 1:39.855, almost five seconds slower than the Mercedes-powered McLaren of Kevin Magnussen. Kobayashi admitted Caterham was focussing on helping Renault develop its power unit before looking at its own performance. "This is what we have in our hands right now so we have to help them to be able to fight with the other engine manufacturers," he told reporters on Thursday. "At the moment, we are definitely...
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