George Russell set to delay Mercedes engine penalty for ADUO upgrade

George Russell is expected to delay his inevitable Formula 1 engine-change penalty until Mercedes is ready to introduce its ADUO-upgraded power-unit specification — a move that may not happen until the United States Grand Prix.

Russell had appeared likely to follow the same route at the next round in Azerbaijan. Baku’s long straights would have offered an opportunity to recover positions, much as Antonelli did at Monza. Mercedes, however, now intends to delay the switch so that Russell’s penalty can coincide with its upgraded parts.

The decision follows Mercedes’ preparations for an update enabled by the extra allowance granted through Formula 1’s Additional Development and Upgrade Opportunities system. The planned specification is understood to include an improved turbo, adding another strategic variable to Russell’s already constrained component schedule. The wider Mercedes ADUO engine upgrade is therefore central to the timing of the penalty.

Why Mercedes is waiting

Russell is already at the limit of his allowance for several key components. He has exhausted his allocations for the internal combustion engine, turbo, energy store and control electronics. Installing fresh versions at the next couple of races would therefore trigger penalties.

A further grid drop would follow if Mercedes then introduced the ADUO-improved parts. From the team’s perspective, taking two separate penalty hits would make little sense when both changes can be combined into one event.

Russell made that position clear when speaking at the Spanish Grand Prix. Asked whether he regretted not taking a fresh engine in Italy, he said: “We were always going to take my penalty with the ADUO upgrade. Otherwise, if I took it there, I’d have to take it again. So it makes zero sense for me.”

Mercedes has not yet made a final decision on the introduction date. The upgrade had initially been expected during the Azerbaijan, Malaysia and Singapore flyaway sequence, but it now appears more likely to arrive during the United States, Mexico and Brazil triple-header beginning in Austin on October 23–25.

Antonelli will also have access to the new specification. His Italian GP change was limited to the internal combustion engine, battery and control electronics, leaving him free to take a new turbo, MGU-K, exhaust and ancillaries without penalty. Any works-team improvement must also be supplied to Mercedes’ customer teams, although each customer will receive only a single unit at the first event.