Overall tata gave the best

Overall tata gave the best car before the service I have got mileage as 15 after 1st service I got 20 mileage.with in a week they delivered our car so there is no problem while delivering the car.the road view is very clear while driving my car in automatic there is lag while switching gear so please try to resolve.coming to engine punch is a 3 cylinder engine and it is not creating the big impact of the change into 4 cylinder turbo means the car sales rate will be increase.