Formula 1's governing body the FIA says the series' power unit manufacturers have unanimously approved changes to how engine compression ratios are measured, with revisions coming as early as 1 June.<br>The compression ratio of the V6 combustion engines, which measures how much the air-fuel mixture inside a cylinder can be compressed, has been reduced to 16:1 for this generation of power units - ...<a class='more' href='https://www.autosport.com/f1/news/fia-announces-clampdown-on-compression-ratio-tests-from-june-2026/10801040/?utm_source=RSS&utm_medium=referral&utm_campaign=RSS-ALL&utm_term=News&utm_content=uk'>Keep reading</a>