Buy a Toyota Prius and you get a backup camera, keyless ignition, iPod integration and travel over 50 miles for every gallon of gas poured therein. Buy an Audi RS4 and you don't even get self-dimming mirrors, and you can only drive 11 miles per gallon of dead dinos (EPA notwithstanding). The Prius will set you back $25k. The RS4 costs three Prii. At freeway speeds, the Toyota is a near silent and comfortable cruiser, whereas the Audi sounds and feels like a volcano making love to an avalanche.