Offered in rear- or all-wheel drive, the ATS has nimble, capable handling and sharp steering that makes it a treat to drive. Three engines are offered: a 2.5-liter four-cylinder, a 3.6-liter V6, and a 2.0-liter turbo four-cylinder. The turbo is quick, but doesn't feel powerful and got just 23 mpg overall. The six-speed automatic is a step behind the seven and eight speeds of most competitors. A manual is available. The ride is taut, and braking is excellent. However, the Cue infotainment system, with its flush buttons, is very convoluted and frustrating to use. The interior is well-finished but very snug. The high-performance ATS-V gets a 464-hp, twin-turbo V6. Reliability has remained much below average.