2. Patton M-47 Tank
Continuing with the military theme, Chrysler and the Continental Motors company developed another Hemi. This time, it was a V12 engine they intended for tank use. They called it the AV1970. It was an interesting air-cooled, turbocharged Hemi engine that delivered over 650 HP in base form.
Over the years, they made multiple versions of this engine. Even though they introduced it back in 1952, the Patton M-47 tank is still in service in some countries. That is a true test of the durability and reliability of the AV1970 Hemi.