Sales of six of Tata Motors models have been affected since the Supreme Court banned the registration of passenger vehicles with engine size of 2 litres (2000cc) and above. The company is learnt to be modifying the engines affected by the ban so that the vehicles with those engines can go on sale again. A senior company official confirmed the move.

Earlier, Mahindra & Mahindra had modified its engine affected by the diesel ban. The company tweaked its 2.2-litre engine to 1.99 litres and launched it last month.

Tata Motors' affected engines are of 2179cc and 2956cc. The company official declined to comment on the displacement of the modified engines and the time of their introduction.