This week on Ignition, Carlos Lago takes out Audi’s new for the U.S. RS5 Sport Coupe. Based on the successful Audi A5, the RS version is powered by a 4.2-liter V8 that makes 450 hp and 317 lb-ft of torque. Power is put down by way of a 7-speed twin-clutch auto that can be shifted manually by way of some flappy paddles on the steering wheel. Keep in mind though that this car is no lightweight. In fact it tips the scales at over 4,000 lbs. thanks largely in part to its all-wheel drive system. Does all that girth mean that the RS5 is too fat to be fun, or does Audi do a great job of masking all that weight with its stellar electronics. Click through to find out.