I have an 86 XJ with a 2.8 with every performance option possible including a Comp cam,Crane rocker arms,500cfm Edelbrock 4barrel,Edelbrock Torker intake,Headers,MSD 6A,MSD BLASTER COIL,and so on.In other words it's built to get as much power out of this lil engine possible.I have to admit it's peppy....but....I also have an 87 MJ that I swapped a 4.3 Chevy boat motor in it and it's like night and day when comparing power and speed between the two.My lil MJ is a beast and the 2.8 Cherokee is "ok". My 4.3 marine engine is rated at 224hp..I don't know the power output of the built 2.8 but it ain't no where near the 4.3..Keep in mind the Cherokee is heavier than the Comanche but trust me I much prefer the power of the MJ.