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2003–present: Hemi. 5.7L Hemi - The smallest modern Hemi engine, called the Eagle, introduced in 2002. 6.1L Hemi - A larger modern Hemi, 2004–2010. 6.4L Hemi - A larger bore modern Hemi engine, called the Apache, introduced in 2011. 6.2L Hemi - A supercharged Hemi engine, called the Hellcat, introduced in 2014.
Like its predecessors, it was a Poly version of Dodge's 270 Hemi. Bore and stroke were the same as the Hemi's at 3 + 5 ⁄ 8 in (3.625 in) by 3 + 1 ⁄ 4 in (3.25 in), respectively (92.1 mm × 82.6 mm). Outputs are 180 or 187 hp (134 or 139 kW) depending on fitment.
Chrysler developed its first experimental hemi engine for the Republic P-47 Thunderbolt fighter aircraft. The XIV-2220 was an inverted V16 rated at 2,500 hp (1,860 kW). The P-47 was already in production with a Pratt & Whitney radial engine when the XIV-2220 flew successfully in trials in 1945 as a possible upgrade, but the war was winding down and it did not go into production.
The full-size Ram pickup truck's piston count is down, but horsepower and torque figures are up across the board. 2025 Ram 1500 Drops Hemi V-8s, Swaps In Hurricane Turbo Sixes Skip to main content
1966 Dodge Charger engine bay. Not to be confused with the 426 Hemi, the 426 cu in (7.0 L) RB was a wedge-head RB block with a 4.25 in (108 mm) bore. The 426 Wedge served as Chrysler's main performance engine until the introduction of the 426 Hemi.
Chrysler's Multi-Displacement System (MDS) is an automobile engine variable displacement technology. It debuted in 2005 on the 5.7 L modern Hemi V8.Like Mercedes-Benz's Active Cylinder Control, General Motors' Active Fuel Management, and Honda's Variable Cylinder Management, it deactivates four of the V8's cylinders when the throttle is closed or at steady speeds.
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