Mercedes-Benz is launching a whole bunch of hot little compacts in the US, from the A35 sedan to the CLA35 also-a-sedan to the cute little GLB35 crossover. But up at the tippy-top of the range is the new CLA45, and friends, it’s a goddamn riot.

The shining star of this AMG isn’t the one on the grille, it’s the turbocharged four-cylinder engine under the hood. Code-named M139, this is the world’s most powerful production I4 engine, producing 382 horsepower and 354 pound-feet of torque. Not impressive enough? The CLA45 S (which isn’t coming to the US — womp womp) turns up the wick to 416 hp and 369 lb-ft. Yes, 416 hp from a little 2.0-liter engine. What a world!
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https://www.cnet.com/roadshow/reviews/2020-mercedes-benz-amg-cla-45-4matic-coupe-review/