From 1 June, new FIA tests for Formula 1 engines mean Mercedes’compression ratio loophole will be closed – but it may not be sufficient for Ferrari to catch up.<br>As the world championship switched to new power units for 2026, the internal combustion engine’s compression ratio was reduced from 18:1 to 16:1. However, the ratio is checked at ambient temperature, and Mercedes found a way to ...<a class='more' href='https://www.autosport.com/f1/news/why-ferrari-believes-f1-engine-rules-tweak-wont-stop-mercedes/10806361/?utm_source=RSS&utm_medium=referral&utm_campaign=RSS-ALL&utm_term=News&utm_content=uk'>Keep reading</a>