Mercedes' power advantage in Formula 1 has been wiped away by a "massive step forwards" from Ferrari and Renault since last season, reckons Sergio Perez. While Mercedes emerged as benchmark power unit when the new turbo hybrid regulations came into force in 2014, its rivals had been able to close up the gap steadily. But it is the step forward that Ferrari and Renault have made over the winter that has left Perez convinced that the Mercedes engines which power his Force India team are no longer clear of the opposition. "I definitely think that Ferrari is at the same level as Mercedes, and Renault is more or less there," explained the Mexican. "We only have the...
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