Red Bull boss Christian Horner says engine supplier Renault are still six months behind rivals Mercedes. Horner described Renault's performance in the Austrian Grand Prix as 'unacceptable' as world champions Red Bull suffered their worst result of the season. 'We raised our concerns as far back as the end of 2012 about the direction the Renault project was going,' he said. 'Renault are just starting to catch up to where Mercedes were six months ago.' Continue reading the main story “Renault have missed the target and are now working hard to catch up” Christian Horner This season saw a massive engine regulation change and Renault's unit, like Ferrari's, has a big performance...
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