Hello, it would take a bit of information about the engine in my Mondeo 2L, model 98. Since the Mondeo is driving very quietly in the normal driving style, it is still very sporty when you pass through the full gas. Had sought the compromise, between my desire confortable and well equipped, and my wife’s desire to get a bit more temperamentally from the spot. If you drive normally, then this means with our driving style, that at the latest 3000-3500 rpm is switched up. n Motor times quite demanding, then from 4000-4500 rpm a change in the sound characteristic takes place. He suddenly sounds really biting, Röhrig and a little bit bad. Since one is now approaching the full power of the engine, the Mondeo also makes fun as a family carriage. Can someone explain to me what happens there, that the engine changes its tone so that one thinks to sit in another car. Gruss vom Ritter