The story about a compression-ratio sensor for 2027 has been refuted

Any talk of a 2027 compression-ratio sensor has been put to rest. The FIA was said to be putting in a sensor in the combustion chamber come 2027 for a live read on the compression ratio and to put an end to the kind of split-combustion contrivances from Mercedes and Red Bull.

MARCA has dismissed that as false, on the grounds that no such technology is available. Back in June 2026 the FIA decided instead to have the engine taken apart at the factory to be verified at room and operating temperature, which they consider a dependable way of doing things.

It was the method and not the 16 to 1 limit that was at fault, so it was right to set the record straight when the first report was being treated as fact.