The Triumph TR4A is a sports car built by the Triumph Motor Company at its Coventry factory in the United Kingdom between 1965 and 1967. It is an evolution of the Giovanni Michelotti styled TR4, with the TR4's Hotchkiss drive replaced by an independent rear suspension, indicated by an "IRS" badge attached to the car's rear.

The Triumph Motor Company was a British car and motor manufacturing company in the 19th and 20th centuries. The marque had its origins in 1885 when Siegfried Bettmann of Nuremberg formed S. Bettmann & Co. and started importing bicycles from Europe and selling them under his own trade name in London. The trade name became "Triumph" the following year, and in 1887 Bettmann was joined by a partner, Moritz Schulte, also from Germany. In 1889, the businessmen started producing their own bicycles in Coventry, England.