The BMW M4 coupe begs for an open racetrack, sunny weather and a tank full of high-octane petroleum distillates. To deliver motorsports-grade performance, engineers took a holistic approach with this car and its four-door sibling, the M3. They reduced weight, improved aerodynamics and of course installed a race-ready powertrain. But, you can get comparable performance from the more affordable Porsche Cayman or Ford Mustang GT… so should you?

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