11. 5.7-Liter Eagle Hemi V8
For the 2009 model year, Chrysler revised its popular Hemi with numerous upgrades including Variable Camshaft Timing. It also featured cylinder heads with a better flow, an upgraded engine electronic system and a new generation of the Multi-Displacement System (MDS).
The power output had risen, so the base 5.7 Hemi now produces 363 HP to 395 HP in some applications. Despite the archaic construction design, modern Hemi engines are surprisingly efficient and compliant with all emissions standards.