&quot;The new engine will meld the best characteristics of gasoline and compression ignition engines with an innovative piston architecture refined by Achates Power that sets two pistons moving in opposition in one cylinder.&quot;<p>We already have this technology. Diesel engines ignite the fuel through compression. We also had the opposing pistons layout for a while (<a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Opposed-piston_engine" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Opposed-piston_engine</a>).<p>EDIT: we even have triangular-y shaped opposing engines (<a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Napier_Deltic" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Napier_Deltic</a>)