Subaru built the only twin turbo flat four in a production car. Here is how this rare EJ20 setup worked, why it struggled, ...

Newly-developed six-cylinder twin-turbo engine replaces retired EJ20 as Subaru aims for first GT300 title since ...

Although Subaru didn't invent flat engines, and isn't the only automaker still using them, those motors have become a defining characteristic of the brand. (The same can be said for all-wheel drive, ...