The DS3 engine that Commer utilized was built by the Rootes group, which owned the Hillman and Humber brands and, at times, built bodies for Rolls-Royce and Daimler, among others. The Commer ...

While most engines made in the last 100 years have adhered to the standard single-piston per-cylinder design, the TS3, also known as the "Commer Knocker," is an exception. The opposed-piston ...