Holden straight-six motor

The Holden straight-six motor was a series of inline six-cylinder engines that General Motors Holden made at its Port Melbourne plant from 1948 to 1986, with a four-cylinder offshoot, the Starfire. The first, the Grey motor, took its name from its grey painted block; it was an overhead valve engine of 132 cubic inches based on the pre-war Buick straight-six, first fitted to the Holden 48-215 and built until 1963. The later Red, Blue and Black motors, and the Starfire, are inter-related, sharing many parts and castings, while the Grey is a different engine. The Grey was a low-stress, low-compression design that proved so ubiquitous it found its way into racing open-wheelers, boats and forklift trucks, and the Starfire also went into the Toyota Corona. These engines powered every Australian-designed Holden of those years.