Drawings in the patent application show the active rear diffuser on what looks like previous-generation versions of the Honda Civic and Acura MDX, hinting that Honda is considering this feature ...

Both offered impressively efficient space with room for four; the hatchback even had a fold-down rear seat. The Civic returned more than 40 mpg thanks to its low weight (approximately 1500 pounds ...

Step back a few feet and the spoiler, lower diffuser, and badging come together to bring a sportier look to the new Civic's rear end—all without taking things too far.