Red Bull team boss Christian Horner says he fears Renault and Honda will be unable to catch up to rivals Ferrari and Mercedes before the new 2021 engine is introduced, but insists his team will do all it can to bridge that deficit with its chassis. Renault has struggled to keep development pace with Ferrari and Mercedes on the power unit side, which has left its customers and its own works team with a power deficit, whilst Honda, which joined the sport later than its rivals, has endured miserable reliability and performance, which is forcing its sole customer McLaren to look elsewhere for an engine deal. Red Bull was in the same boat at the end of the 2015 season when it angled for a...
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