Our Four Seasons Audi RS4 has a lot of fans around the office. While it's a great all-around car, it's the 8,250-rpm, 420-hp, 4.2-liter engine that really gets our attention. The V-8's power delivery is so linear that it feels like an electric motor, except of | The Audi R8 is one of the most gorgeous sports cars out this year, and it also just happens to sound great. Watch it on the dyno here. |