His family said the cause of death was congestive heart failure.
Mr. Stuarti's Broadway career included productions of Cole Porter's Around the World and Rodgers and Hammerstein's Me and Juliet. His stage names included Larry Laurence and Larry Stuart before he settled on Enzo Stuarti (at the suggestion of Ed Sullivan, according to the New York Sun).
Mr. Stuarti also appeared in commercials for Ragu spaghetti sauce, famously saying, "That's-a nice!"
Among his recordings are "Enzo Stuarti Arrives at Carnegie Hall" and "Bravo Stuarti! Soft and Sentimental."
According to the New York Sun, Mr. Stuarti was born Lorenzo Scapone in Rome. He moved to the Newark, N.J., in 1934, joining his family, who had left the old country earlier. He served in the Merchant Marines during World War II, lived again in Italy and the returned to the U.S. in 1951, according to the Associated Press. A career on Broadway, in concerts with orchestras and in clubs in New York and Las Vegas followed.
According to the Internet Broadway Database, Mr. Stuarti's Broadway credits under the name Larry Laurence included By the Beautiful Sea, Me and Juliet, Two on the Aisle, As the Girls Go, and Cole Porter's Around the World.
He married Esther Mesce in 1942 and they had two children, Larry Stuart of Orlando, FL, and Andrea Leib of Menifee, CA. Stuarti married his second wife, Thelma Donohoo Stuarti, in 1975. They retired to her hometown of Midland, TX, in 2004.