FIA Approves Mercedes and Red Bull Engines

A debate has emerged in Formula 1 over the next-generation power units. According to sources, Mercedes and Red Bull have identified a loophole in the regulations that allows their engines to reach a compression ratio of up to 18:1 under operating conditions, despite the rules setting a limit of 16:1.

The key point is that the FIA measures the compression ratio statically, at ambient temperature. Under these conditions, the engines fully comply with the regulations; however, on track, increased internal temperatures can alter the parameters, potentially delivering a power gain of around 15 horsepower.

Ferrari, Audi, and Honda have approached the FIA seeking clarification, but the governing body found no grounds for objection. Since the engines meet the regulatory limits during official measurements, their behavior at higher operating temperatures is not considered a breach of the rules.

As a result, the Mercedes and Red Bull power units have been deemed legal and approved for use in the upcoming season. Other manufacturers, according to reports, will not be able to introduce similar changes before 2027, although some flexibility remains prior to final homologation.