Robins played a major role in Sir Alex Ferguson winning a first trophy for United in the 1990 FA Cup.
"To draw United is certainly special," Robins told BBC CWR. "But to draw any one of those teams would have been special.
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"If you look at the teams left, to be in the cup at this stage with the top clubs is an achievement in itself.
"I was there as a kid and came through there at United. But my loyalties are certainly now with Coventry City.
"It's at Wembley. It's a brilliant occasion. We've got to come up with a plan that's going to give us an opportunity to compete in the game and see where it takes us."
Robins added: "You saw them against Liverpool. You saw the quality of the players they have.
"The pace, the power and the quality they've got - if they can play like that and you give them space and time then they'll hurt anybody."