William Heynes had been working to produce a completely new box section cruciform braced chassis for a vastly improved new model range. Meanwhile Weslake had been turning his talents to the Standard engine and by adopting overhead valves he succeeded in increasing output from 75 hp of the previous 21/2 litre sidevalve engine to no less than 105 hp.

For the new chassis and engine unit, Lyons designed a fresh body style, less flamboyant than previous models, yet still stylish. Indeed it was closer to contemporary Bentleys which cost nearly four times the price! Sophistication was increasing, and now customers were offered four doors for the first time on an SS. Indeed so different were the new models that it was felt that a new model name was needed. The Company´s advertising agency suggested ´Jaguar´ and though Lyons took some persuading, it was finally adopted. Thus the new cars would be known as SS Jaguars. The ´Jaguar´ name was an ideal choice for feline grace and elegance, combining docility with remarkable power and agility. The cars have matured and developed to justify the analogy in every way.

A year later a team of three cars was entered by the factory in the RAC Rally, the premier such an event in Britain. The team, which included the Hon. Brian Lewis (later Lord Essendon) took the Manufacturer´s Team Prize but outright success eluded them. Instead the event was won by a privately entered SS 100!