New Delhi, Aug. 6 -- Indian EV makers have topped a global energy efficiency ranking. Tata Motors and Mahindra outperformed 20 other automakers worldwide, including Tesla and BYD. The findings come from the ICCT's Global Automaker Rating report.

The International Council on Clean Transportation (ICCT) measured energy consumption in watt-hours per kilometre. Lower figures indicate more efficient use of electricity. Crucially, the data was adjusted for vehicle weight.

This ensured heavier vehicles were not unfairly penalised. The result allows fairer comparisons across different manufacturers.

Tata Motors scored 100, the highest among all 22 automakers. Mahindra followed closely behind with a score of 89. Tesla scored 79 while BYD manage...