In case you weren't in Switzerland for the 77th Geneva International Motor Show, here's a look at the world's first horizontally opposed (boxer) turbodiesel engine. Subaru designed the compact 2.0L DOHC 4-cylinder with a variable geometry turbo, intake throttles, glow plugs, high-pressure common-rail fueling with up to five injections per cycle, and a diesel particulate filter that's attached directly to the turbo. The folks at parent company Fuji Heavy Industries Ltd. have not released much more information other than the fact that the diesel will fit into the Symetrical All-Wheel-Drive platform that is used for the Subaru Impreza WRx. The hot rod STi version of that car uses a 2.5L turbo gas boxer to make 293 hp and 290 lb-ft of torque, so it's not hard to imagine a 2.0L oil burner that sips #2 diesel and gets about 35 mpg while making up to 200 hp and 400 lb-ft of torque.