Subaru

Boxer and flat engines are a highly-uncommon sight in the modern-day automotive industry. Currently, there are only two manufacturers that continue to produce and develop boxer engines – Subaru and Porsche. The boxer engine is most commonly characterized by its flat design hence it is, often, referred to as a flat engine. The first boxer engine was developed in 1897, by Karl Benz – the co-founder of what would eventually become Mercedes-Benz. There is a common misconception when it comes to these engines. Boxer and flat engines are not quite the same. All boxer engines are flat engines, but not all flat engines are boxer engines. This misconception comes from the 1973 Ferrari 512 Berlinetta Boxer. Despite the name, it does not feature a boxer engine, but rather a flat-12 engine or a 180-degree "V-engine". Boxer and flat engines are more different than you think, and here is what sets them apart.

Currently, only two carmakers produce boxer engines – Porsche and Subaru. Normally, when you hear a six-cylinder boxer engine, the first to come to mind is the German automaker, famous for being the last brand to put an air-cooled engine in a high-performance sports car. Subaru is still sticking to flat-four engines for its models, but back in the golden era of Japanese sports cars, it introduced a six-cylinder boxer engine that could rival what Porsche had. The EG33 was the only flat-six Subaru engine to feature in a two-door coupe. It also served as a basis for future Subaru flat-six engines. In 2020, Subaru produced its last flat-six engine, but before that happened Subaru almost redefined the GT segment altogether, with a Porsche-sounding Subaru, powered by a flat-six.