The company had sold 97,225 units in the corresponding period of 2012.
Global sales of all passenger vehicles in August 2013 stood at 43,474 units, down 7.77% from 47,141 units sold in August 2012, Tata Motors said in a statement.
Sales of the company's luxury brand Jaguar Land Rover, however, rose by 28.40% to 30,895 units during August, as compared to 24,060 units in August 2012.