Tata Motors' scrip ended the day 2.76 per cent higher at Rs 345.90 on the BSE. In intra-day trade, the stock had gained 3 per cent to Rs 346.90.
At the NSE, the scrip rose 2.88 per cent to settle at Rs 346.10.
On the volume front, 10.28 lakh shares of the company changed hands on the BSE, while over one crore shares were traded at the NSE during the day.
The cars -- Zest, a compact sedan, and Bolt, a hatchback -- will be powered by the company's new Revotron engine series.
These two new products are based on the company's enhanced X1 platform, on which the existing Vista and Manza models are built.
Both the new cars have been a result of collaborative design inputs from the three Tata Motors design studios in Pune, Coventry (UK) and Turin (Italy), the company said.