In the early 2000s, Chrysler relaunched its HEMI line of engines, including the 5.7L and 6.1L versions. Other than the displacement, what else is different?

The compression ratio was also increased from 9.6:1 to 10.3:1, with all of these changes resulting in an engine robust enough to handle 425 horsepower and 420 pound-feet of torque.

In this Hemi engine swap guide we explain everyhting you need to know to install a late-model 5.7L or 6.1L Hemi engine into your early ... 9.6:1. 10.3:1. Combustion chamber. 84.5 cc. 71.5 cc ...