It would still look like a fast car even if it was powered by a lawnmower engine. On the other end of the spectrum, there is a whole group of cars that conceal powerful drivetrains under the sheet metal of a mundane family hauler, like this V8-powered Rover 75 pictured. From high-horsepower MPVs to track-ready SUVs, we’re taking a look at some of the ultimate sleepers ever sold: