"Bill was a TV legend and Jack Duckworth epitomised what Coronation Street is all about," Roache said.
Coronation Street On Stage has already been a hit in Britain. Performances are scheduled for theatres in Auckland, Wellington, Nelson and Christchurch.
The two-hour spectacular follows the fortunes of two of the soap's most famous families, the Barlows and the Platts.
It includes characters past and present including Ena Sharples, Hilda Ogden, Hayley and Roy Cropper and bottle-blonde barmaid Bet Lynch.
"I'm glad the play is travelling around because I want to see as much of New Zealand as I can," Roache said. "I'll hire a car and take it all in."
Roache said he was aware New Zealand episodes were running about 18 months behind the UK schedule.
"I must still look like a young thing to the Kiwi viewers," he joked.
"But in what other job would you have a jailbird wife, a murderess daughter and an alcoholic son to deal with? It sure keeps it interesting.
"I still love it. Even at 80, retirement is not an option."
Tickets for Coronation Street On Stage - priced from $59 (plus booking fee) - go on sale from the usual outlets at 9am on Tuesday, November 20.