Average is 10.8kmpl in city driving with ac and light foot. I got the Liana checked as starting was taking 6-7 seconds of cranking. Turns out one injector was leaking (collar broken) and one was not working, so two injectors changed, ultrasonic cleaning and throttle body servicing at fazal mill (opposite lucky one mall) cost Rs.3200. I have filled the fuel tank and will check average in a few days, but starting is sharp and throttle is much much more responsive.
Compared to a rolla, the power steering is much heavy and engine and outside noise is more noticeable, the cabin is not as isolated as in a rolla. But still very good value for money, same condition same model rolla will cost atleast 70% more than a liana.