Most of the companies has produced the petrol cars as well diesel, but the diesel car rate is so much of high , why you will not make this kind of diesel car with 5 lacs amount of the onroad price. Reason: I)IF the budget is 5lacs can able to buy all the middle class people and it can cover most of the developing country. But the developed country having all the type of car ,so there u can release some high price cars so that productivity will compensate all the way. Thanks I am one of the software engineer in MNC company