Before Formula 1 even drove a meter with the new 2026 engines, a discussion arose about the compression ratio under the new regulations. The value was 18:1 under the old rules, but was reduced to 16:1 for 2026. This should make it easier for new manufacturers to get started.
However, competitors have noticed that Mercedes adheres to the 16:1 specification in static tests, but may achieve a higher ratio at higher temperatures while driving.
Audi, Ferrari and Honda then jointly sent a letter to the International Automobile Federation (FIA) to request clarification. But after an initial expert meeting on January 22nd, the association did not appear to be planning any measures for the time being.
In the meantime, further meetings have taken place, including those of the “Power Unit Advisory Committee” on Thursday. According to information from the global edition of Motorsport.com The compression ratio was once again high on the agenda and was discussed with all parties involved – but without a final decision.
The other engine manufacturers are continuing to examine ways to get the FIA to intervene before the start of the season. The focus is on adapting the measurement methods for the compression ratio.
Currently only static tests are carried out at ambient temperature. One of the ideas being discussed is to do the testing after the engine has warmed up. Measurements under hot conditions would provide a more realistic picture and reveal possible differences. Another idea involves using sensors while driving.
Red Bull and the FIA tipping the scales?
However, this is easier said than done because any changes to the procedure require a so-called “super majority”. That means four of the five engine manufacturers, the FIA and Formula 1 have to agree.
In this context, Red Bull Ford Powertrains plays a key role. With the letter from Audi, Ferrari and Honda it was already clear that three of the five manufacturers were demanding a change.
Red Bull itself has also been linked to the possible loophole. However, this picture has been put into perspective somewhat in recent weeks. There are indications that Red Bull is aware of Mercedes’ solution but might not oppose FIA intervention.
This would be particularly the case if your own advantage was smaller than that of your main competitor, i.e. Mercedes and its customer teams.
In addition to Red Bull’s stance, the positions of the FIA and Formula 1 are also crucial. Both organizations usually coordinate together on technical issues.
As already mentioned, the FIA initially saw no reason to intervene, but after Thursday’s meeting it remains to be seen whether their assessment will change. When asked, an FIA spokesman said the issue would continue to be discussed internally and an update could only follow at a later date.
Time is running before the homologation deadline
If the measurement procedure were actually revised, it would have far-reaching consequences – not only in terms of sport, but also with regard to the homologation date. The 2026 engines have to be homologated on March 1st, so there is hardly any time left for adjustments.
Changes to the drive units usually require long lead times. Toto Wolff recently clearly formulated his opinion on the topic. The Mercedes team boss said in the run-up to the start of the season that other manufacturers “just have to get their act together”.
“I just don’t understand why some teams concentrate more on the others and keep arguing about a thing that is very clear and obvious,” said Wolff, who emphasized: “The communication with the FIA was very positive throughout, not only with regard to the compression ratio, but also in other areas.”
“Especially in this area, the regulations are very clear. The standard procedures for all engines are very clear, even outside of Formula 1. So just pull yourself together,” said Wolff, who made it clear: “The drive unit is legal. The drive unit complies with the regulations. The drive unit complies with the checks carried out.”
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