The State and Revolution
Whereas Lenin's idea of a dictatorship was to have a small group of vanguard protalitariots to have complete political and economic control over everyone.
As I understand Marx's theory, the bourgeoisie would overthrow the wealthy and the powerful. I assume the bourgeoisie are the upper middle classes such as property and business owners. Then eventually, the lower working classes and the poor would swamp all of the upper classes and somehow - he wasn't very clear - completely collapse society and create communism. Does that sound about right to you?