I agree with Beanmachine, I have to admit, Diesel is pretty badass, when I see a big ass diesel truck with stacks blowin out thick clouds of black smoke, It always amuses me. Take my dad's 7.3 L Powerstroke Ford F250 for example, His is on an 8 inch lift with 35's, my dads a diesel technician, so he has his diesel all rigged up with all the goodies, and I mean everything, (Chip, Turbo, Module/Tuner, Stacks, CAI, etc.). Its badass. As For putting a diesel in a ranger, I would stick with sumthin that you can find in the states. I wuld probably look into that Cummin's 4 banger diesel engine, I think its like a 3.4 or a 3.9 L engine (can't remeber exactly which one, srry), and it is said to put out around 170 - 190 horses, and upwards of 300 ft lbs of torque, If that ain't pretty badass on a ranger, I don't what is (Besides a V8 swap). You can't go wrong with a Cummin's, my Uncle's got a 1996 Dodge with the old skool 12 valve 5.9 L Cummin's in it, and hes got nearly 650,000 miles on it, and it stills runs like a champ, and for one thing, its a 5 speed manual, ive gotten to drive it, its a fun truck to drive. It hauls ass too.