The FIA has no questions about the Mercedes and Red Bull engines.

      We have already reported on the Formula 1 scandal related to the switch to next‑generation power units. Mercedes High Performance Powertrains and Red Bull Powertrains managed to find a "gray" area in the regulations and achieve a compression ratio of 18:1, whereas the regulations allow no more than 16:1. Under current FIA procedures, the compression ratio is measured statically at ambient temperature. Mercedes’ and Red Bull’s engines demonstrate compression ratios within the permissible range at the time of measurement, but higher internal temperatures during operation can cause engine components to expand, increasing cylinder volume and raising the compression ratio to 18:1, which gives a power gain of around 15 hp. In this regard, representatives of Ferrari, Audi and Honda turned to the FIA asking it to investigate the situation. As the Italian press reports, the FIA had no questions for Mercedes and Red Bull, since during measurements at room temperature the compression ratios comply with the regulations, and it does not matter if the figures are higher at elevated temperatures. Thus, the FIA acknowledged that the Mercedes and Red Bull power units comply with the regulations, and they will be allowed to use them in the upcoming season. Sources claim that other manufacturers will only be able to make changes to their engines by 2027, given the long lead times for implementing modifications. However, it should be noted that the power units have not yet passed final homologation, so it cannot be ruled out that someone may try to make design changes quickly before the start of the season. Considering that the situation became public only a few days ago, while manufacturers had known about it for several months, they have most likely been working on finding solutions in case the FIA does not find any violations by Mercedes and Red Bull.