What engine is in the Hellcat?
The Hellcat is powered by a supercharged 6.2-liter V8 Hemi engine.
In more detail, the Hellcat family uses a high-output version of Dodge’s 6.2-liter Hemi V8, paired with a Roots-type supercharger and intercooler. While the core architecture remains the same across variants, horsepower (and tuning) varies by model year and variant, ranging from the original 707-horsepower configuration to higher-output versions in later releases.
Engine variants and horsepower benchmarks
Before listing the major variants, note that the Hellcat lineup centers on one core engine with different calibrations. The followingSummary provides a quick snapshot of the key production figures.
- SRT Hellcat: approximately 707 horsepower
- Hellcat Redeye: approximately 797 horsepower
- Challenger SRT Super Stock: approximately 807 horsepower
These figures reflect the most widely cited factory horsepower ratings for each variant and can vary slightly by model year, transmission choice, and drivetrain configuration. All variants share the same fundamental 6.2-liter Hemi V8 with a supercharger.
How the engine influences performance
The boosted V8 backbone contributes not only to peak horsepower but also to rapid throttle response and strong mid-range torque. In the Hellcat lineup, torque typically sits in the range of roughly 650 to 707 lb-ft depending on the specific variant, while redline and boost characteristics are tuned to deliver aggressive acceleration and a signature soundtrack.
Technical notes
Key technical elements include the intercooled supercharger system, a hardened rotating assembly, and an engine management strategy designed to maximize power while maintaining reliability under track-ready conditions. The same basic block and bore/stroke dimensions serve multiple variants, with calibration and components adjusted to achieve the different horsepower targets.
Summary
In short, the Hellcat’s engine is a supercharged 6.2-liter Hemi V8, the core of a family that spans several high-performance variants. From the original 707-horsepower Hellcat to the 797-horsepower Redeye and the top-end 807-horsepower configurations, all Hellcat models rely on the same fundamental engine architecture, only tuned differently to achieve their respective performance goals.
