https://www.jalopnik.com/2062764/why-diesel-engines-have-higher-compression-ratios-than-gas-motors/
Jan 4, 2026 - Because diesel vehicles do not use spark plugs, they must rely on higher compression ratios to ignite the diesel fuel without an external flame.
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https://arstechnica.com/cars/2025/12/f1s-new-engines-are-causing-consternation-over-compression-ratios/
Dec 23, 2025 - A loophole in the rules might have given Mercedes and Red Bull a big advantage.
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