Wrangler YJ Engine

The Wrangler YJ was built with three different engines from 1987 to 1995.

4-cylinder Engines

• 1987 to 1990 models were equipped with an AMC 150cid (2.5L). This engine had a Throttle Body Injection (TBI) that produced 117 brake horsepower (BHP) at 5,000 RPM.
• 1991 to 1995 models were equipped with the same AMC 150cid (2.5L), however this engine had a Multi-Port Injection (MPI) that produced 123 brake horsepower (BHP) at 5,250 RPM.

6-cylinder Engines

• 1987 to 1990 models were equipped with an AMC 258cid (4.2L). This engine was carbureted and produced 112 brake horsepower (BHP) at 3,200 RPM.
• 1991 to 1995 models were equipped with an AMC 242cid (4.0L). This engine had a Multi-Port Injection (MPI) that produced 180 brake horsepower (BHP) at 4,750 RPM. It is reported that some late 1990 models were lucky enough to come with one of these.

AMC 150 (2.5L): inline 4-cylinder available 1987–95.
AMC 258 (4.2L): inline 6-cylinder available 1987–90.
4.0L (242): inline 6-cylinder available 1990–95.