Autobayng News Team
The FIA has revealed it plans to tackle the row over Formula 1’s new power units by introducing an additional test from August.
At least one engine manufacturer is thought to have found a way of exceeding the 16:1 limit on compression ratios specified by the new 2026 regulations. While their engine meets the limit when cold, while running at higher temperatures the ratio increases.
Mercedes is believed to have mastered this approach, which could give their power unit a performance advantage over rival designs. Its power units are used by its factory team as well as McLaren, Williams and Alpine.
The FIA intends to introduce a new test to ensure power units meet the 16:1 limit at higher temperatures. However it will not be introduced until after the 14th round of the 24-round season.
“Over recent weeks and months, the FIA and the power unit manufacturers have collaboratively developed a methodology to quantify how the compression ratio changes from ambient to operating conditions,” said the FIA in a statement. “Following validation of this approach, a proposal has been submitted whereby, from 1st August 2026, compliance with the compression ratio limit must be demonstrated not only at ambient conditions, but also at a representative operating temperature of 130C.
“The vote has been submitted to the power unit manufacturers and its outcome is expected within the next 10 days and will be communicated in due course. As with all Formula 1 regulatory changes, any amendment remains subject to final approval by the FIA World Motor Sport Council.”
If the rule is passed, it will come into force in time for the Dutch Grand Prix on August 23rd, the first round after the summer break.
The issue has been a matter of considerable debate. Mercedes, which set the quickest lap time in testing at the Bahrain International Circuit last week, has consistently insisted its power units comply with the regulations as written.
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