All models had a single plate cork insert clutch, running in oil, with a spring hub.

Available as a 4-door saloon, the Sixteen had a Morris QH engine the same size as its predecessor, at 2062cc.

The Twenty-One, available as a 4-door saloon, had a Morris OJ engine displacing 2916cc and achieving 20.92hp (RAC hp).

[4] The Twenty-Five "Series III" had a new over-head valve Morris OPEM engine, still displacing 3485cc and rated at 25 hp.

The model is distinguished by a small number of cosmetic changes including a painted, rather than chromed, radiator cowl.