Dodge 5.9 Magnum vs 5.7 Hemi: Which Old-School V8 Still Holds Up?

When comparing Mopar's most popular V8s, the contrast between old-school toughness and modern refinement is clear. The 2026 Ram 1500 and Jeep Wrangler 392 showcase the late-model Hemi V8's power and efficiency. 9-liter Magnum, an engine built for longevity and easy modification.

9-liter V8 for 1993. It was an updated version of the LA engines used from 1964 to 1991, with almost no interchangeable parts except connecting rods. 9 Limited and Dakota R/T.

By the early 2000s, the Magnum struggled with emissions and rising horsepower demands. Chrysler introduced the 5.7-liter Hemi for 2003, which was more powerful and efficient. Ram halted Hemi availability in 2025, but brought it back for 2026 after customer backlash.

The 5.9 Magnum produced 230 horsepower and 325 lb-ft of torque (245 horsepower and 335 lb-ft by 1998). The 5.7 Hemi delivered 345 horsepower and 375 lb-ft in trucks, with later versions reaching 395 horsepower and 410 lb-ft with eTorque.

Common Magnum issues include upper plenum leaks, oil consumption, and cracking at valve seats. The Hemi is known for "Hemi tick", lifter failures damaging camshaft lobes, especially on 2009 and later engines with MDS cylinder deactivation.

For buyers, the Hemi wins on power and efficiency. The Magnum wins on simplicity and reliability. A 5.9 Magnum crate engine or supercharger kit offers modern reliability or extra performance for enthusiasts. Both engines remain important chapters in Chrysler's history.