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According to a media report, Tata Motors will not upgrade its 1.05-litre, 3-cylinder diesel engine to comply with BS-VI emission norms. At present, this engine does duty in the Tiago and Tigor. This could mean that the two cars are not likely to be offered with a diesel engine from April 1, 2020.
The carmaker has said that the petrol variants of the Tiago and Tigor account for 80% of their total sales. During the period April 2018-January 2019, diesels accounted for 14% and 15% of overall Tiago and Tigor sales respectively. As demand for diesel variants is low, the company considers developing new BS-VI compliant small capacity diesel engines unfeasible.
The Tiago and Tigor share the same engines. The diesel versions of the car are powered by a 1.05-litre, 3-cylinder engine that produces 69 BHP @ 4,000 rpm and 140 Nm @ 1,800-3,000 rpm. This engine is mated to a 5-speed manual transmission. The petrol versions of the cars draw power from a 1.2-litre, 3-cylinder that makes 84 BHP @ 6,000 rpm and 114 Nm of torque @ 3,500 rpm.
Source: Autocar India