Let’s clarify the numbers: the current Formula 1 regulations allow an internal combustion engine compression ratio of 16:1 measured at ambient temperature. All power units checked in Australia were compliant with the 2026 technical regulations.<br>However, a heated controversy has been sparked by some F1 power unit manufacturers claiming that Mercedes, thanks to the introduction of a pre-chamber ...<a class='more' href='https://www.motorsport.com/f1/news/f1-compression-ratio-there-will-be-a-tolerance-for-measuring-it-when-hot/10804160/?utm_source=RSS&utm_medium=referral&utm_campaign=RSS-F1&utm_term=News&utm_content=www'>Keep reading</a>