A diesel engine's piston head looks like someone took a scoop ... Whereas, by comparison, the gas-powered Hemi option in the same Ram only has a 10.9:1 compression ratio. These engines require ...

The third-generation Chrysler HEMI proved the engine's versatility under the hood ... 9:1 -- as it uses a different piston design. The truck variant also uses a different camshaft that was ...

Surprise, HEMI V8 engines aren't dead. Stellantis is restarting production in North America with vast improvements.

With heavy internal components, an emphasis on torque, and a long piston stroke ... of that an exciting milestone in a Hemi. Yet, advancements in engine technology since the golden years of ...