Tata Motors said overall global vehicle sales rose 13 percent in August, with demand at the automaker's Jaguar Land Rover unit rising 13 percent, less than in previous months, to 24,060.
Sales at the luxury British brands, a key driver of the company's recent profit growth, rose 41 percent in July, 39 percent in June and 35 percent in May.
Last month, Tata sold 2,960 Jaguar cars and 21,100 Land Rover vehicles, representing over half of the Indian company's monthly passenger car sales, the company said in a statement on Monday.
Tata Motors, part of the salt-to-steel Tata Group conglomerate, sold a total of 97,225 vehicles in August. Overall passenger cars sales stood at 47,141 vehicles, a rise of 23 percent from a year earlier.
Commercial vehicle sales rose 4 percent to 50,084.
Tata, which bought JLR from Ford in 2008 for $2.5 billion, plans to invest $12 billion in the unit over five years to win a bigger share of a premium-car market dominated by BMW, Audi and Mercedes-Benz.
Reuters contributed to this report