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

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, ...

In Porsche’s long and storied history, few mechanical creations have reached the mythical status of the four-cam flat-four engine. Born in the crucible of motorsport in the early 1950s, it was a ...