Bro 9th Gen has better fuel average than Grande!!! My 9th Gen's are giving 10-12.5 in city depend on driving style and long routes 14-15 at speed of 110-120 and i myself drove at speed of 90 for 100 kms or so and got average of 21.5 KM/Ltr and it was 100% authentic, cause i got only fuel of Rs. 500.00 from Sukheki when i have last bars being showing in fuel bar and after driving for 100 Kms till my home it was back on 2 bars... petrol was 113 at that time!!!
and for Grande, we have driven it for 150 kms till now and its showing average of 8.1 till now!!!!
Correct me if i am wrong!!!
But i have both the cars!!!! i am talking based on experience!