F1 | 2026 Engines, Mercedes and Red Bull are "cold turkey": the other teams will have to adapt, but it will take months

The long march towards the Formula 1 The 2026 season risks being marred by a technical controversy destined to leave its mark. At the heart of the dispute among manufacturers is the interpretation of the new limit on engine compression ratio, an issue that is fueling political tensions and competitive questions just months before the new regulation's debut.

According to some assessments that have emerged, the extensive exploitation of certain regulatory areas could guarantee a significant performance advantage. In this context, Mercedes Benz e Red Bull They are indicated as the manufacturers who have interpreted the regulatory framework most effectively, while other producers are observing the evolution of the situation with growing concern.

The central issue concerns Article C5.4.3 of the 2026 technical regulation, which establishes that no cylinder can exceed a geometric compression ratio of 16.0The standard also specifies that the measurement procedure must be performed at room temperature and according to criteria defined by the manufacturers, subject to FIA approval. It is precisely this formulation that generates different readings.

From the point of view of Mercedes and Red Bull, what counts is exclusively the value detected during the static checks required by the regulations. According to this interpretation, the legal text is respected to the letterOther manufacturers, however, refer to Article C1.5, according to which single-seaters must comply with the rules “at all times during the competition”, arguing that a compression ratio higher than 16:1 under operating conditions would constitute a violation.

The FIA, at least for now, has reiterated its clear position. A spokesperson for the Federation clarified: "The regulation clearly defines the maximum compression ratio and the measurement method, which is based on static conditions at room temperature. This procedure has remained unchanged despite the reduction in the permitted value for 2026."

A line that seems to confirm that the regulatory reference remains that of cold controls, similarly to what happens in other technical areas of Formula 1.

From a performance standpoint, the potential benefit is far from negligible. Simulation studies indicate that an increase in compression ratio from 16:1 to 18:1 could be worth up to 10 kW, equivalent to about 13 horsepower.Translated to the track, the estimated benefit varies between three and four tenths per lap, depending on the characteristics of the track, with indirect effects also on overall efficiency and fuel load.

The real problem, however, concerns the possibilities of reaction. The 2026 power units are already in an advanced stage of design and production and, although official homologation is scheduled for March, in practice the margins for structural changes are now limitedMajor interventions on the engine architecture require a long time, making a complete recovery unlikely before 2027.

A possible regulatory solution is represented by Additional Development and Upgrade Opportunities, designed by the FIA ​​to avoid excessive gaps between manufacturers. In the event of significant performance deficits, Some manufacturers may benefit from additional development windows during 2026It remains to be seen, however, whether these tools will be sufficient to compensate for any structural advantage linked to the compression ratio.

On the political level, Ferrari, Audi, and Honda have already requested formal clarification from the FIA ​​through a joint statement. An official response could define the issue and prevent the discussion from escalating into a formal dispute, a possibility that some have already been warning about starting with the Australian Grand Prix.