Q. What is the function of torque as in 1.5 liter petrol Creta and Seltos we get 144nm where as in 1.4 turbo we get 244nm?

Ok lets see, its the twisting force applied to say a nut when tightening it, as the engine rotates it gives a rotational force (twisting).ul have to look into construction of an engine to see how pistons connecting rods, connected to primary shaft especially the construction of this shaft which converts to rotational motion. the function of turbo gives this extra torque as it in a way compresses the air fed into the GDI injectors along with the fuel.

Yes