― Cadillac's new luxury compact sports sedan will go on sale this summer. The 2013 Cadillac ATS will compete against the BMW 3 Series, Infiniti G, Audi A4, Mercedes-Benz C Class, Lexus IS, and the Volvo S60. ∙ The base model ATS will start at $33,990 including destination. This ATS model will be equipped with a 2.5L I-4 engine producing 202 hp. The 2.5L engine will be paired with a 6-speed automatic transmission. Standard on all ATS models is the CUE infotainment system. The middle level [...].