GM Inside News reports that General Motors is working on a new turbocharged four-cylinder engine for the Cadillac ATS. The small-displacement engine is expected to produce between 270 and 280 horsepower. Those are impressive figures, though there's no indication as to whether or not the engine will require premium fuel.

If true, the engine's introduction only stokes the rumors indicating that GM is walking away from V6 drivetrain options in its mid-size offerings altogether. Automakers like Kia and Hyundai have already abandoned the six, allowing those companies to produce lighter, more efficient sedans that are just as powerful as their V6 competition.

GMI says that the new 2.0-liter will be cut from the same cloth as the 2.5-liter Ecotec four-cylinder that GM recently unveiled in the 2013 Chevrolet Malibu. In other words, while it may borrow some tricks from the turbo 2.0-liter lump that powers the Buick Regal GS, it will by and large be its own beast.

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