And YES, you are absolutely right regarding brand new, PKDM 660 cc Alto car. Its fuel efficient, good for City driving, AC is just fine (not exceptional), etc. However, the moment 3-4 persons sit, there is luggage, you have to move on highway at high speed, or driving on steep slope, and then when its extremely hot, car, its tiny 660 cc engine, and AC, all fail.
That's why I don't like, prefer and recommend 660 cc cars.