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

In the performance world, there are only three cars left with a turbocharged flat-four engine. They are the Subaru WRX, Porsche Boxster, and its hard-topped sibling, the Cayman. According to Porsche, ...

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 ...

The Holden is fitted with a gargantuan 1,172.8cc flat-four engine, representing one of the earliest experiments in high-cylinder motorcycle design. Talk about the sheer audacity of packaging four ...

There are many unique attributes that have made Subaru such a successful auto brand. One is the company's signature symmetrical all-wheel-drive system, which comes standard on the majority of Subaru ...

Flat engines are horizontally-opposed piston engines, and this group includes Boxer engines, but not opposed-piston engines like the Cummins 14.3L Advanced Combat Engine (ACE) designed to power tanks.