After four years of success, Red Bull is now struggling to produce the goods to deliver the results that propelled Sebastian Vettel to his four titles. Despite a disastrous pre-season test, the defending world champions have emerged as the best of the rest after six races but have been unable to challenge the dominance of Mercedes. A major reason for its downfall has been Renault’s failure to produce a power unit that’s on par with Mercedes’, with some reports suggesting that the deficit is as much as 80bhp. And with no development allowed through the course of the season, owing to homologation regulations, Red Bull is set to lose its crown. It’s then no surprise...
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