The HEMI 6.1-liter engine is based on the 5.7-liter V8 ... The compression ratio was also increased from 9.6:1 to 10.3:1, ...
While the second-generation 426 HEMI clearly earned its rank as a high-horsepower engine, the newer 5.7- and 6.1-liter third-gen HEMI V8s provide impressive horsepower ratings as well as improved ...