If a “sleeper” is defined as an unassuming car that can blow the doors off most vehicles around it on a racetrack or drag strip, then we’re living in a golden age of sleepers.

Practically every German luxury sedan that’s not powered by a four-cylinder wears stately sheet metal and packs upwards of 350 or 400 horsepower, so if every sedan is a sleeper, are any of them, really?

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