United announced on Wednesday night that they had agreed a fee with Arsenal for the Holland striker, subject to him settling personal terms and passing a medical, which he will undergo in Manchester today.
Ferguson likened his present situation to that he had in 1999 when Andy Cole and Dwight Yorke scored 53 goals during United's Treble-winning campaign, reinforced by Champions League final heroes Teddy Sheringham and Ole Gunnar Solskjaer.
"It gives us more strength and more combinations up front.
"In 1999 I had Dwight Yorke, Andy Cole, Teddy Sheringham and Ole Gunnar Solskjaer, the four best strikers in Europe.
"It is a fantastic collection of players and hopefully I pick the right combinations.
"It is great to have a player of Robin van Persie's qualities to come into the squad. I am very pleased."