Its rolls back in fly overs

It is not a very good car but it is very good to ride in highway with family an friends ...It's pick up is very slow ...The car doesn't have a sudden pickup like hyundai cars ...on hills and fly overs the car rolls back in that situation it is very dangerous... And it doesn't have a great mileage it's mileage is just 12 Kmpl in city and in highway it's 15 Kmpl exact...but cars looks very premium...in comfort and safety it doesn't compare with any other cars...