This 1926 Buick Model 50 rode on the Master Six chassis, Buick’s top engine platform for the era. For 1926 the inline six grew to 274 cubic inches (4.5 liters), an overhead-valve design making 75 horsepower – genuinely strong for the mid-1920s. Photographed here courtesy of Gateway Classic Cars, it is a reminder that Detroit’s obsession with horsepower did not start with the muscle car era; it just got louder later.