Roberta Peters, the coloratura soprano who at 20 was catapulted to stardom by a phone call, a subway ride and a Metropolitan Opera debut — her first public performance anywhere — all in the space of five hours, died on Wednesday at her home in Rye, N.Y. She was 86.

The cause was Parkinson’s disease, her son Bruce Fields said.

Ms. Peters, who would sing with the Met 515 times over 35 vigorous years, was internationally renowned for her high, silvery voice (in private, she could hit a high A, two and a half octaves above middle C); her clarion diction in a flurry of languages; her attractive stage presence; and, by virtue of the fact that she and television came to prominence at about the same time, her wide popular appeal.

“As a coloratura,” Cue magazine wrote of Ms. Peters in 1960, “she has no peer.”