It has booster and as mentioned earlier by another member except first two, all other features are un-available in Xli too 
Mehran at 80-90 will give you 21-23 km/l on highway. Doubt it? Let go on a drive on mine
I got 17 km/l on constant 120 km/h from Kalar Kahar to Lahore ( I was in hurry due to some work )
True.