Buchanan, who was named League One Player of the Year at the North West Football Awards on Monday night for his form with Tranmere last season, came on for the final 10 minutes against Boro having spent the best part of a month on the sidelines due to a knee problem.
North End boss Graham Westley was returning to his old stomping ground and Buchanan felt the significant ex-Stevenage contingent among the Lilywhites' squad added an extra edge to the game.
"I came on on Saturday, it was great to be part of a 4-1 win and now I'm hoping to hit the ground running," said the 26-year-old.
"It was certainly the best away performance by any stretch of the imagination. The lads were fanstastic from the whistle.
"Obviously it was a big game for the football club in terms of the manager going back to Stevenage and we've got four players at the club now who were going back to Steveange.
"So that's always got a bit of an edge to it but we prepared well all week and we went down there with belief that we could get a positive result against a side sitting second in the league. No one can take away the performance or the victory from us because on the day we were a different class to them."