Value for money but not economical in bumper to bumper

Had a great buying experience with blue Hyundai Gandhi Bazaar. I was in Delhi and all deal happened over phone 5/5 to Blue Hyundai. The car is loaded with all latest features in Cabin. Was wondering how 999 engine generates so much power but when u hit the highway u feel the punch. Looks: Looks are great all-around except back. When u look from behind it looks a small hatchback. Performance: So I took the car to Ooty on a weekend drive. Ooty was cold, the realised engine takes time to heat up to climb a steep hill. Mileage : City bumper to bumper average is 10 Kmpl and on highways 15-16 kmpl. Pros: Value for money Cons: Mileage lower side in bumper to bumper traffic.