The Punch, Altroz and Nexon benefit from a lower tax slab since they fulfil two key requirements - their length is less than 4 meters, and their petrol engine capacity is less than 1200cc.
Even if one of the criteria is not fulfilled, these cars will fall under a higher tax bracket, resulting in a higher price. So, to answer your question, it is highly unlikely that the company will introduce Tata Sierra's 1.5L petrol in these compact cars.
