An advertisement for the Ensign 6, a 6. 7 L (410 cu in) high-performance car similar to the Bentley Speed Six, appeared in The Times for 11 November 1920 with the phrase "If you are interested in a supercar, you cannot afford to ignore the claims of the Ensign 6. " The Oxford English Dictionary also cites the use of the word in an advertisement for an unnamed car in The Motor dated 3 November 1920, "The Supreme development of the British super-car. " and defines the phrase as suggesting "a car superior to all others". A book published by the Research Institute of America in 1944, that previewed the economic and industrial changes to occur after World War II, used the term "supercar" (author's emphasis) to describe future automobiles incorporating advances in design and technology such as flat floorpans and automatic transmissions.