Since the Cadillac ATS premiered, many of us have been awaiting the addition of one letter to the model nameplate. As Cadillac billed their latest vehicle as a BMW 3-Series fighter, we've eagerly wanted to see the American luxury brand attempt to match wits with the M3. Almost two years since the global introduction of the ATS, the 2016 Cadillac ATS-V appears on paper to be the compact performance car meant to give the BMW M3 a kick in lederhosen. To be offered in both the sedan and coupe body style, the 2016 ATS-V is Cadillac's first use of a twin-turbocharged V-6 engine in their V-Series performance line. A similar 3.6-liter displacement powerplant as the one offered on the CTS Vsport model , the Cadillac Twin Turbo engine has been specially tailored for the ATS-V to produce 455 horsepower and 445 pound-feet of torque. Low-inertia turbochargers equipped with lightweight titanium-aluminide turbines that reduces the amount lost energ...