VVTi stands for Variable Valve Timing with Intelligence. Its a system which improves performance and efficiency of the engine. Mostly fitted with Toyota's.
VVTi : Variable Valve Timing with Inteligence. It is the advanced version of the VVT engine. It changes the cam shaft position by using oil pressure. It is simmilar to CVVT in Hyundai.
although four stroke engine is more frequently used 2STROKE engine is more effiecient because for every 2 strokes there is a power stroke.for same power generation 2STROKE ENGINE is compact
2 stock engine is more efficient than 4 strock, because Power generation for 2 strock required one strock of compression and one strock of discahrge, while for the same power a 4 strock engine require...
Pradeep sharma
Nov 25th, 2011
4 stroke is more efficient due 2 its better milage, less wear & tear of parts, contain valves prevent frm leakage, deliver one power stroke in 4 cyle.
But in case of power, 2 stroke is better. it delivered 1 .8 times more power than 4 stroke.