Borini became the first signing of the new Brendan Rodgers era, and the Great Dane is an admirer of the former AS Roma star.
"He's exactly the kind of player who will fit into the system Brendan wants to play," Molby told liverpoolfc.com.
"Technically, Borini is very good, he has two good feet, his movement is excellent and he's a goalscorer. The manager has spoken about playing 4-3-3 and Borini could slot in anywhere along that front line.
"His mobility and work rate is ideally suited to the kind of football the new manager wants to see.
"There wasn't one Liverpool player who could be happy with their goal return last season. We desperately needed more options up front. We need to be more prolific this season and hopefully Borini will help us achieve that.
"Brendan has stuck his neck out for this kid and clearly has a lot of belief in him."