I have done a project on this topic. Details are Vitz Engine = 44,000 Alternator 13KVA china Used = 40,000 Coupling = 20,000 Chassis = 25,000 ATS and wiring, Radiator, Fan etc = 42,000 Gaskit, Electronic Governor, Modified manifold, Valve, = 35,000 Total Cost me 225,000 Some silent features are its silent.... no noise and disturbance. Very less gas consumption only 6000 rs bill for whole month with 2 air con 1.5 tons. If u people want to see pictures I will share.