15. Chrysler 6.2-Liter SRT Hellcat Supercharged V8
One of the meanest, scariest engines on this list is Chrysler’s crazy 6.2-liter supercharged Hemi. Chrysler produced these V8s for their Hellcat versions of the Challenger and the Charger. This engine pushes the boundaries of Hemi design as well as the concept of a street-legal V8. With 707 HP and 650 lb-ft of torque on tap, the Hellcat Hemi propels any car to sublime speeds in just a couple of seconds. This is the final and most powerful version of Chrysler’s 5.7-liter Hemi, which debuted in 2003. The secret of the Hemi engine is its cylinder head, which is bigger and more hemispherical, hence the name. This concept allows the engine to burn more fuel at higher rpm to deliver more power.
Even though the basic 5.7 Hemi was a decent engine, Chrysler engineers wanted more. With the help of a larger displacement block and 2.4-liter supercharger unit, they got the monstrous 707 HP that deserves the nickname, “Hellcat.” However, car fans are afraid this is the last time they’ll see a crazy engine like that. The trend is to downsize, so the Hellcat Hemi could be the last great American V8.