Tata Nexon (2020-2023) mileage varies, depending on the variant. The petrol-manual variant has a mileage of 17.40 km/l. The petrol-automatic model has a mileage of 16.30 km/l. The diesel-manual variant has a mileage of 22.40 km/l. The diesel-automatic model has a mileage of 22.40km/l. Note that the mileage figures are as per ARAI.