OMG dude you have way to much time on your hands. My gf works on a daily basis with sketch up, and she finds this impressive.

 

first, the 4.0 i Have in my cherokee has a blown head gasket and a warped head. to repair it properly will cost me the same as what is invested in purchasing the OM617.

only 3 engine related electrical devices.
-glow plugs
-alt
-starter

MPG-29 in the 4000 lb benz. people usually report around 25 MPG in a lifted jeep

it is not "more powerful" as that is relative. the garrett T-3 turbo is its main fault, as well as a restrictive air box. replacing these 2 items with modern counterparts makes up for these discrepancies. increasing its stok 110hp/180lb ft tq up to around 150/210, and thats an estimate, as people have gotten them to 200/280 with no internal changes. the turbo replacement is costly, but if i can get one relatively cheap i will.

 

the XJ was already done, i just modified it to what i wanted mine to look like.