which car is best ?CRDI Diesel or petrol or petrol engine converted to run on LPG ?

Question

i am from india, i am thinking of buying a new sedan , i drive around 4000 km per month, which engine option is best for me . i am in favor of diesel but some people say the cost of frequent change of oil and oil filter is very high . can some body help me make a decision

Answer 1

This would be a personal decision. I would think the diesel would benefit you best. good luck

Answer 2

What the hell have the shockers, dashboard and instruments got to do with running an engine on a different fuel? Do you people actually understand the questions you're answering, or are you just trying to bump your points score up? The best answer was regarding the compression ratio and engine design. The gearbox on a diesel is exactly the same as a petrol engine. The ancillary components (alternator, steering pump, aircon etc) are exactly the same as a petrol engine. The dashboard!!!!! is exactly the same as a petrol. The only electrical difference is with regard to engine control and fuel pumping i.e. a glowplug circuit is needed on a diesel where it isn't on a petrol, but a petrol can use up to twenty sensors to tell the ecu how to operate, a diesel uses two or three. Modern diesels will run on a compression ratio as low as 13:1. The design of the combustion chambers and injection systems have made this possible. The cylinder heads are very similar but still different enough to negate modification (glowplugs are required for a start!). Diesel injectors and fuel pumps are completely different. A petrol fuel system runs at approximately 40-50psi. A diesel fuel system with direct injection can top 30,000 psi. Even the old indirect systems reached 4000psi. The pump is usually run from the end of the camshaft or timing chain which would need modifyng to accept the pump. The bottom-end of a modern diesel is very similar to that of a petrol - they're not that much heavier these days, it's more the top-end of the engine that would be a nightmare to modify. So in answer to the actual question asked, NO, you can't MODIFY a petrol engine to work on diesel, but you could swap parts from one to the other and mackle a working engine. Not an efficient working engine, but you would get it to turn and possibly run (a bit!). But not effectively to actually run a vehicle for any length of time.