Plymouth was introduced to the low-price field by Chrysler in 1928, as the company expanded its offerings to include not only Chrysler and Doge, but Plymouth and DeSoto.
By 1931 Plymouth had taken over third place in new car sales - a remarkable achievement. Despite the looming Great Depression, Walter Chrysler re-tooled the Plymouth line and produced the new Type PA with 'Floating Power' (a unique system of mounting the engine.)
Despite having four cylinders to Chevrolet's six and the soon-to-be Ford V-8, Plymouth sales did well. It offered, as Chrysler claimed, 'The Smoothness of a Six with the Economy of a Four.' This example, a convertible coupe, sold for $645 in 1931.