Audible feedback is psychologically important to the driving experience and the impression of power. The 4-cyl Mustang makes over 300hp, for instance, which is considerably more than the 5.0 and 4.6L V8s of even a few years ago. However, the sound is not the same, so they doctor it via the stereo. (NYSE: GM) The nice thing is that your neighbor gets his fast car that only sounds loud on the inside, instead of making pushrod, flowmaster symphonies in your neighborhood every day. The soundproofing on modern cars is so good, you can't hear your engine at all, and that's disconcerting. You need to be able to hear if it's making a funny noise or something, and nobody wants to go buy a Camaro and then cruise around feeling like they're driving a Tesla. According to CNN, "The new Camaro will be at least 200 pounds lighter than today's model thanks to various weight-saving parts. A new design makes the car look lower and wider even though its actual dimensions are within 2 inches of the current Camaro."