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The AMC straight-4 engine is a 2.5 L straight-four engine developed by American Motors Corporation (AMC) that was used in a variety of AMC, Jeep, and Dodge vehicles from 1984 through 2002. The 2.5 L I4 Jeep engine shared design elements and some internal components with the AMC 4.0 L I6 that was introduced for the 1987 model year.
Engine bay of a 1993 Jeep Grand Cherokee with 4.0 L The 5 millionth Jeep 4.0 engine produced on the "Greenlee Block Line" dated June 15, 2001 The 242 cu in (4.0 L) engine was developed by AMC in just 26 months using many off-the-shelf components while featuring, among others, additional strength, improved combustion chamber, port setup, and cam ...
Starting with the 1986 model year, the AMC straight-4 engines used a throttle body injection (TBI) or single-point, fuel injection system with a new fully computerized engine control. [3] In addition to cycling the fuel injector (pulse-width time, on–off), the engine control computer also determined the ignition timing, idle speed, exhaust ...
The Cherokee AHB police package was introduced during the 1992 model year. Starting in 1996, Jeep released a special version of the XJ Cherokee SE for police and fleet use. It featured no interior rear door handles and a revised 190 hp (142 kW) high output version of the 4.0 L "Power-Tech" inline six-cylinder engine.
The engines in Jeeps featured a heavier flywheel than the Buick version to help dampen vibrations resulting from the engine's firing pattern. The engine was known at the time for its power and reliability. It would idle slowly, but not as smooth as other engines, especially the inline sixes. This engine was used in the following vehicles: Jeep CJ-5
Early AW4s used 21-spline output shafts. In 1991 the AW4 was changed to a 23-spline output shaft, concurrent with adoption of the High Output (commonly known as H.O.) inline six-cylinder engine. Some sources state that the output shaft spline change occurred for the 1990 model year.
A range of AMC engines were offered: the 110 hp (82 kW; 112 PS) 258 cu in (4.2 L) inline six-cylinder, a 175 hp (130 kW; 177 PS) 360 cu in (5.9 L) V8 with two-barrel carburetor, a 195 hp (145 kW; 198 PS) four-barrel 360, the 401 cu in (6.6 L) V8, and even a Zeitgeist/Peugeot turbo diesel, albeit very rare. The durable 401 had a forged ...
The Chrysler 1.8, 2.0, and 2.4 are inline-4 engines designed originally for the Dodge and Plymouth Neon compact car. These engines were loosely based on their predecessors, the Chrysler 2.2 & 2.5 engine, sharing the same 87.5 mm (3.44 in) bore. The engine was developed by Chrysler with input from the Chrysler-Lamborghini team that developed the ...