Carlos Sainz is certain that Renault has made a "big step" with its power unit for 2019, having delivered the fastest lap time of pre-season testing thus far on Wednesday. Sainz's time of one minute 17.144 seconds came in an impressive 130-lap programme in the McLaren. Sainz's headline time is not only the quickest of this year so far, but also faster than the top time of 2018, set by Ferrari's Sebastian Vettel – flying in the face of suggestions that 2019's cars would be slower than their immediate predecessors. Although Sainz remains wary of reading too much into Renault's improvements, the former works team driver says the progression is notable from the cockpit. "It...
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