What is the on-road mileage of Tata Tiago XZ (petrol model) in city?

Tata Tiago can return a mileage of around 18 kmpl when calculated with mixed driving conditions. The petrol engine is a good 1.2 L, 3-cylinder Revotron motor with a maximum output of 83.8 BHP and 114 Nm of torque. The 1080 kg car is restricted due to it's heavy weight else it could have been delivering around 20 kmpl on the same conditions. The best part of the Tiago is it's built quality as it gets a good looking exterior with excellent finish for it's class.