Looking at the numbers of laps completed by Power Unit it would appear that Renault has caught up significant ground on Ferrari and Mercedes-Benz.
Mercedes-powered Williams led the field in terms of number of laps covered with 323, while Nico Rosberg piloted his Mercedes AMG W05 to the quickest lap (1:33.283) during the first four days of testing in Bahrain.
However, when dissecting all the figures we must point out a couple of caveats. Lotus was at this test, whereas they weren’t present at Jerez. That means Mercedes-Benz and Renault powered four teams each and Ferrari the remaining three.
Perennial strugglers Marussia managed only 29 laps, which skews Ferrari’s figures somewhat. The bar graphs showing the teams paints a clearer picture with three of the four bottom teams all powered by Renault.
The Renault-powered team to cover the most miles was Caterham (253 laps) and across the four days the closest it got to the fastest lap of the day was 4.975 seconds on day 2.
Of the remaining Renault-powered runners Toro Rosso did the most laps (134), followed by Red Bull (116) and Lotus (111).
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[Source: Formula1.com]