Powertrain genealogy
The engines tell their own ownership history
Go Devil, Hurricane, Dauntless, AMC inline-sixes, Hemi and Hellcat V8s, and the modern Hurricane inline-six map alliances, acquisitions, and changing vehicle missions.
Go Devil won on output and durability
Delmar Roos's L-head four was central to Willys' successful wartime package.
Dauntless made a corporate round trip
The Buick V6 entered Jeep under Kaiser and later returned to GM ownership as corporate relationships shifted.
AMC's 4.0 became a durability icon
The long-lived inline-six connects late AMC engineering to years of Chrysler-era XJ, YJ/TJ, and Grand Cherokee service.