GM has been relatively quiet about the 2013 Cadillac ATS, but the company might have been teasing the model for months.

GM has been relatively quiet about the 2013 Cadillac ATS, but the company might have been teasing the model for months.

Nothing is official, but keen-eyed observers have noticed a mysterious prototype on GM's homepage. We're not entirely sure this is the ATS, but the vehicle does have some striking similarities to recent ATS spy photos.

Regardless of what it is, the Cadillac ATS will ride on the new Alpha platform and be available with all-wheel drive. Engine options remain a bit of a mystery, but a four-cylinder is expected in the base model and the ATS-V could feature a turbocharged 3.0-liter V6 with 380 hp (283 kW / 385 PS).

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Cadillac ATS teased?