This Was The Last Volkswagen To Roll Off The Line With An Air-Cooled Flat-4 Engine

VW started building air-cooled flat-4 engines in the 1930s, and it didn't stop for over seven decades. But the last one ...
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Subaru is the only US automaker still building a turbo flat-4 engine

Subaru stands out as the only U.S. automaker still producing a turbocharged flat-4 engine, a configuration that offers unique benefits in performance and handling. With a rich history and a commitment ...
Jalopnik

One Of The World's Only Twin-Turbo Flat-Four Engines Was Built By Subaru – And It Didn't Go As Planned

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, ...