Ferrari could run a very big risk linked to the 2026 Power Unit: if the FIA remains immobile with respect to the alleged irregularities of Mercedes and Red Bull, and if the benefits for these two teams are such, the Prancing Horse would find itself starting with a clear handicap, to which it could react in a very short time. Let’s try to understand what happens and what Maranello’s response could be.
Power unit 2026: the trick on the compression ratio
The recent debate on new generation power units requires careful technical examination. The compression ratio geometric represents the mere relationship between the maximum volume reached with the piston at bottom dead center (BDC), and the minimum volume, when the piston reaches top dead center (TDC), compressing the mixture inside the combustion chamber.
According to article C5.4.3 of the 2026 regulation produced by the International Federation, this compression ratio must be set on the value of 16:1. In other words, the mixture is compressed into a space sixteen times smaller than the initial volume, in itself approaching the risk of self-ignition without the aid of the spark. We know that the FIA checks take place with the engine off.
A procedure which in fact limits the possibility of verification inherent to the correct compression ratio fully operational. The difference between a cold and hot engine becomes crucial, therefore. Mercedes and Red Bull are the teams at the center of attention, as they could take advantage of this discrepancy. As the temperature increases, the metal components undergo thermal expansion.
An ad hoc designed element could lengthen or otherwise change shape, effectively increasing the TDC to reduce the volume of the mixture until obtaining a theoretical compression ratio of 18:1, exceeding the regulatory 16. This increase would produce approx 15 more horsessignificant benefit on performance. But as mentioned, the FIA procedure on checks takes place exclusively with the engine off.
An approach that highlights a significant regulatory limit, since at present there are no tools to ascertain the real value of the compression ratio when the power unit is working at full capacity, in real operating conditions. The difference between the cold engine and the engine temperature is substantial and represents the point on which the two teams in question could build a technical advantage thanks to thermal expansion.
Power Unit 2026: the position from the FIA
At least on a theoretical level, the Italian team had various strategies to respond to the issue at hand. The first consisted of requesting clarification from the International Federation. In the last few hours, the meeting between engine engineers and the power unit advisory committee (PUAC) took place, with Nicholas Tombazis and Vincent Pereme in charge of evaluating the legitimacy of the solutions adopted by the Red’s rivals.
The Prancing Horse’s hope in this sense was quite clear. It was about issuing a technical directive which could clarify how thermal expansions can influence the geometric compression ratio. In the meantime, Maranello has already analyzed the competitors’ possible solutions, trying to estimate their impact and understand whether the International Federation could intervene to cancel out any advantages.
However, we know well that, if the tests carried out by the FIA continue to be carried out cold, the suspect power units would be completely compliant. A scenario that would consequently go to penalize and not a little the rest of the motorists, including the history of the Italian team as a constructor. Furthermore, it must be said that a change in the verification procedure could reduce uncertainty, but not eliminate it completely.
Ferrari Engine 2026: the risk of a strategic delay reigns
We still have to point out one fact, which although different in the argument still raises the same question. It is possible that if the International Federation does not have the physical capabilities to be able to carry out specific checks automatically do you judge murky situations as regular? It has happened many times, even in the last regulatory era when we talked about McLaren’s flexible wings.
The current fact seems to be this: the FIA does not have the right tools to measure the compression ratio with a hot engine. This is why, in the absence of a clear technical directive in this regard, Ferrari could find itself suffering a major disadvantage on the table. A technical and sporting scenario which would consequently force the Maranello team to consider a partial redesign of the engine.
An operation that would take a long time: it would not be enough to modify the connecting rod or the components, as it would require a new design of some elements, rebalancing the crankshaft, simulating, producing and testing the new unit. All added to the bench tests and subsequent optimizations. An iterative process estimated to take 4 to 6 months, which would risk compromising a large portion of the season for the Italian team.
