Toro Rosso needs to “fine-tune” Honda upgrade

Honda trialled its new-spec engine in Friday practice for last week’s Russian Grand Prix but reverted to an older spec for the weekend after noting some “unsuitable behaviour” on-track. It tested the upgrade this week on the dyno and has confirmed it will be in the car for Friday’s running. Gasly said: “Clearly I think it is a gain of performance. As I said in Sochi we don't knew ... ... Keep reading