City mileage will completely depend on your driving style and proper and timely car maintenance, varying from 12kmph to more than 17kmph. Obviously, the slower and more calmly you drive it, the more mileage you will get. Change filters, oil, etc on time and don't use dou number oil.
Having used it for couple years now, there is no power lag so to speak. The car engine will knock if you use substandard fuel but otherwise, it pulls from the curb easily even when 5 people are sitting in it. Obviously, the lesser the weight, the more the pick.
On the motorway, the cars pulls too easily crossing 150kmph without significant effort. One doesn't realizes one is travelling at such high speed unless one looks at the speedometer.