Floyd DeSoto Akers, 83, retired president of Capitol Cadillac-Oldsmobile Co., who was active in civic affairs, died of cardiac arrest Wednesday at his Washington home.

He had been president of the company from 1934 until retiring in 1970, and had been president of Suburban Cadillac-Oldsmobile during the 1950s.

Mr. Akers had been chairman of the D.C. Armory Board and the Metropolitan Police Complaint Review Board and a trustee of the John F. Kennedy Center for the Performing Arts.

He was a part-owner of the Washington Senators baseball team during the early 1960s.

He was a native of Wabash County, Ind. and a graduate of the Ferris Institute in Big Rapids, Mich.

He had worked for General Motors Acceptance Corporation in New York and as a sales representative for the Cadillac motor car division in Detroit before moving here in the 1930s.

Mr. Akers served in the Army in France during World War U.

During World War II, he served as a member of the Naval Manpower Commission, and was chairman of the Washington Community War Fund in 1943. He received a 1944 Naval Meritorious Award.

He had been a director of the American Security and Trust Co., a member of the Board of Trade and a director of the National Symphony. He had belonged to the City Tavern, Capitol Hill International, and University Clubs.

Mr. Akers had been president of the Downtown Lions Club and Congressional Country Club. He was a Mason and a Shriner.

He was a member of National Presbyterian Church.

His wife, the former Irma M. Wolf, died in 1975.

He is survived by two daughters, Shirley Lowe, of Chevy Chase, and Tomajean Jobe, of Washington.

The family suggests that expressions of sympathy be in the form of contributions to the National Presbyterian Church.