Both Fiat Grande Punto as well as Maruti Ritz are equipped with same powered engine..... The petrol variants of Maruti Ritz are equipped with latest K12M engine that is specifically designed for Indian road to offer high performance with good fuel economy ...... for more details about these cars along with its prices in your city you may visit the following link ...... Maruti Ritz ...... Fiat Grande Punto
Sir, if all the engineers are saying that there is a problem in Punto than they might be right, then you should test another Punto in same variant for that problem. If you feel the same problem in the other car also than the engineers are right. But if you won't found the sane in test vehicle, then there Might be a problem with your tyre or wheel or it might be a problem in suspension system. If the problem is with tyre, then it is a regular problem. But you are saying that the problem appears when it just jumps over a bump. By this, it is sounding as a problem with suspension system.