It has been a while since we had a proper rivalry in the compact sports car segment. While the people at BMW would not (at least publicly) hesitate to brush-off any attempts by Cadillac to claim a piece of their brand’s “Ultimate Driving Machine” image, the people at the crested shield for for all intents and purposes are serious. The critics have taken note, and whether or not BMW is on board, the battle between the Cadillac ATS and the all-new BMW 3 Series is on!