Rajiv Ratna Gandhi ( ; 20 August 1944 -- 21 May 1991 ) was the seventh Prime Minister of India , serving from 1984 to 1989 .
Rajiv Ratna Gandhi ( ; 20 August 1944 -- 21 May 1991 ) was the seventh Prime Minister of India . He served as prime minister from 1984 to 1989 .