Frank Schmitt has the best answer and the best explanation of VTEC. I'll add a couple of secondary points and I'll take the question literally as it appears the OP is asking about the engines and not just VTEC. The VTEC engines made a lot of power... read more
VTEC engines need you to wring it's neck often, so the power delivery does not feel efffortless, that's great for a track day special but where there is insane traffic jams, it's a pain to drive especially with a manual transmission. read more
VTEC (which stands for Variable Valve Timing and Lift Electronic Control) is an electronic and mechanical system in some Honda engines that allows the engine to effectively have multiple camshafts. As the engine moves into different rpm ranges, the engine's computer can activate alternate lobes on the camshaft and change the cam's timing. read more
VTEC stands for Variable Valve Timing and Lift Electronic Control. Honda developed this variable valvetrain system in order to offer efficiency and power in smaller engines. VTEC systems use two camshaft profiles, one for bottom end economy and another for top end performance. read more