Just look at it: The limited-edition 2020 McLaren 620R has a race car livery, a giant, manually adjustable carbon-fiber rear wing that sits 12.5 inches off of its tail, real diffusers out back ...

Three movable elements—a front spoiler, rear wing, and flaps ahead of the front radiators—combine for a host of possible combinations based on speed and mode. There's also a new air-brake ...