Scuderia Toro Rosso Technical Director James Key, says the teams year away from using Renault engines has highlighted just how much the French manufacturer have improved. The Faenza based squad switched to year old Scuderia Ferrari engines in 2016 at the last moment, following a row between parent company Red Bull Racing and then engine supplier Renault, over the lack of reliability and performance of their power units. The disagreement was eventually put to bed and the Milton Keynes based squad opted to stay with the French manufacturer, albeit with engines rebranded under the TAG Heuer moniker. The delay in sorting out their differences however, left Toro Rosso with little time to...
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