I have the Tata 800cc Dicor TCIC engine in mind which is a BS4 CRDI unit from a Tata Ace pickup. BHPian dieselhead recently shared this with other enthusiasts:As I plan to swap a diesel engine on a Tata Nano GenX would like to seek information around how to go about it. I have the Tata 800cc Dicor TCIC engine in mind which is a BS4 CRDI unit from a Tata Ace pickup. I believe this the same engine Tata Motors was planning to launch the diesel Nano with.Would appreciate any information, photos or videos if one has tried it. Here's what BHPian condor had to say on the matter:Imagine the FE with that diesel engine Btw, that particular diesel engine is on the smaller side.