The 6.4-liter Hemis are similar but have increased displacement but no superchargers. Some are common enough they even have names, like the “Hemi tick.” But in general, there are plenty of Hemi examples that have north of 300,000 miles on them. The Hemi engine family has been a proven, reliable engine, but there have been problems off and on for years.
But the larger cubic-inch Hemi blocks have some differences from earlier Hemis including more nickel content, more webbing, and larger cooling passages, besides horsepower and torque specs. Since all of the Hemis from the 5.7-liter to the 6.4-liter are of the same general parts bin, we’ll refer to the family in general. The Ram Hemi engines have been in production for almost 20 years, with the supercharged 6.2-liter arriving in 2020 in the Ram TRX.
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