What is the mileage of Hyundai i20 Active on highways and City?

Hyundai i20 Active gives a mileage of 17.25 Kmpl and 21.19 Kmpl in city and highway respectively when its a diesel. On the other hand with the 1.2 Litre Kappa Dual VTVT petrol engine it gives a mileage of around 13.5 kmpl in city driving conditions and 17.19 Kmpl when driving on highways.