[youtube]https://www.youtube.com/watch?v=Lk4YupnyKtI[/youtube] It has 640 horsepower under the hood. It’s capable of hitting 200 miles per hour. It’s well under $100,000. It’s also an American luxury sedan built by Cadillac, and it seats five people. Four of them could be screaming… The all-new 3rd-generation Cadillac CTS-V is an extraordinary machine. It’s a super sedan that’s been had its German rivals in its crosshairs for decades. Now, however, it’s the Audi, BMW, and Mercedes-Benz offerings that could be looking to catch up. [Disclaimer: Cadillac tossed us the keys to the CTS-V and included a tank of gas. I returned the car with fuel but with a bit less rubber.]