MONZA, Italy -- As far as Ferrari's technical director Mattia Binotto is concerned, the debate over the legality of his team's power unit is "completely closed".
For the first time since 2014, Ferrari has gained a noticeable power advantage over Mercedes, and since the British Grand Prix in July has extended its margin over the world champions. The exact details of how Ferrari has extracted so much performance from its power unit in such a short period of time remains a mystery outside of Maranello, but Mercedes has been keen to flag its deficit to the media.
GPS traces of the cars on track suggests the extra performance comes on sections of the circuit where Ferrari is deploying electrical energy from its hybrid system.