Absolutely ok to ask questions. Please accept that the same questions may - over time - lead to the same answers.
If you are concerned with the reliability of your Roxor and some of us are not, that is ok. Keep in mind that we are owners just like you and our answers are limited to our own experiences with our own machines.
For additional details on the engine, you can lookup M2DICR. The engine is uses in the Roxor and other Mahindra cars. You can trace it back 40 years to French Peugeot with a naturally aspirated and turbo versions. (And it is not a tractor engine as some have speculated).
It is not not a quiet, modern diesel, but it is a very mature design.
If you move forward and make updates (e.g. replace injectors, lift pupm, etc.), keep us posted, please.