MOC automobile engines

I was messing around trying to build an engine to go into a new MOC for this months LUGNuts challenge, and I decided to pull out all my MOC engines to have a look at them together. All in all they're pretty much similar, yet all done differently. I sure like that jet blade piece! None of them are based on anything real, some of them have their exhaust pipes removed, and two of them haven't been used yet.

 

Done