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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 standard engine choice on Ram Heavy Duty trucks is the 6.4 L Hemi V8 gasoline engine, with an available upgrade to a Cummins-sourced ISB I6 diesel engine. The Hemi V8 is expected to be discontinued in 2025 in favor of the Cummins I6 diesel engine for 2025 onwards.
The Hemi-6 is a pushrod O.H.V. (overhead valve engine), with combustion chambers comprising about 35% of the top of the globe. This creates what is known as a low hemispherical shaped chamber. In this way, the "Hemi" moniker was used for the same kind of marketing cachet as Chrysler's 1950s-1970s Hemi V8 engines.
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.
The Chrysler B and RB engines are a series of big-block V8 gasoline engines introduced in 1958 to replace the Chrysler FirePower (first generation Hemi) engines. The B and RB engines are often referred to as "wedge" engines because they use wedge-shaped combustion chambers; this differentiates them from Chrysler's 426 Hemi big block engines that are typically referred to as "Hemi" or "426 Hemi ...
These trucks had a 5.9 L (360 cu in) engine with upgraded exhaust and 15 hp (11 kW) more power. These also included 17-inch (432 mm) wheels with Goodyear Eagle II 275/60R17 tires. 3212 were built. The SS/T (Super Sport Truck) version was available from 1997 until 1998 and included all the upgrades except the door sticker.
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