Cadillac's smallest car, the ATS, comes in sedan and coupe body styles. Depending on the version, it can be equipped with a 2.5-litre four cylinder (sedan only) or a 272-horsepower, turbocharged 2.0-litre engine. Finally, there's a 335-horsepower, 3.6-litre V6 for the most daring. Did we say the most daring? No, they opt for the ATS-V, which is equipped with an explosive 464-horsepower, twin-turbo 3.6-litre V6. Fear not, the car's handling is up to the challenge.