Honda F1 engine upgrade to debut at Hungary filming day

The chassis package that finally got Aston Martin back into the midfield mix in Hungary was always meant to be the first half of a two-part recovery, and now the second half has a date. A filming day is a constrained environment — 200km on demo tyres — but it gives Honda and Aston Martin a controlled first read on whether the power unit upgrade actually complements the revised chassis before Zandvoort. The vibration issue that resurfaced on Friday, then apparently resolved by swapping to a fresher engine, adds a layer of urgency: if the old-spec unit is already degrading, the new one needs to arrive and work. Alonso's framing of the partnership as mutually dependent rather than one side carrying the other is the most honest signal yet of where both organisations think they stand.