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For the 2012 model year, the 545RFE was recalibrated and introduced as the 65RFE in Ram 1500 models. With the exception of an improved torque converter, it is physically the same as its predecessor. The key difference in the 65RFE is the ability to use all six forward gears in sequence when using Electronic Range Select mode.
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.
2014 Ram 1500 Urban Concept – The 2014 Ram 1500 Urban Concept features a 6.4 L (390 cu in) Hemi V8 producing 470 hp (350 kW) and 470 lb⋅ft (637 N⋅m) of torque. The engine comes from the Dodge Challenger SRT8 which is paired with a 5-speed automatic W5A580 transmission or a 6-speed manual Tremec TR6060 transmission.
In addition, the Ram 1500 features active front grille shutters, which are now driver-adjustable, as well as a lower drag coefficient for improved aerodynamic performance. Also new for the Ram 1500 is a new 4×4 Off-Road Package, which includes a factory-equipped suspension lift, off-road tires, and enhanced off-road performance and handling ...
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
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.