The engine used for the 20 h.p. model was also adapted for an Austin tractor, running on paraffin, and having a drawbar pull of 3,000 lb. This tractor won many agricultural awards between 1919 and 1921. A 13 ton truck was also produced, using the same engine.
The Company's post-war programme included, for a short time, a range of aeroplanes!
The Austin Greyhound 2-seater fighter was one, and the Austin Ball single seater another. Then there was a single seater biplane with folding wings, which sold at £500, and a fourth called the Austin Whippet.
In 1921 Came the 12 h.p. car which was literally a smaller version of the 20 h.p. model. This proved so successful that it stayed in production for nearly nineteen years and at one time was used by over go per cent of the taxicab drivers in London. The four seater touring version at £550 was described as "a car of moderate dimensions which would fulfil ideals of service previously only obtainable in high powered cars of 20 h.p. or over." In fact, so efficient was the design that it changed but little during its long life.
And then, in 1922, Came the 7 h.p. infant prodigy. It was received with much laughter at first and few took it seriously. Not so Sir Herbert Austin (Knighted in 1917). He had designed it entirely on his own and despite all criticism, he knew it was a winner.
The engine, with its 2½ in. bore and 3 in, stroke, developed 10 h.p. at 2,400 r.p.m. and was one of the smallest four-cylinder power units yet made. In many ways the car was a large car in miniature, scaled down with that perfection of simplicity which is the hallmark of genius. It weighed only 9 cwt., had an overall length of 8 ft. 9 in., but still provided seating for four.
When the first Seven was completed the mechanics of the Experimental Department watched Sir Herbert take his place in the driving seat to make the first run, just as he had done seventeen years ago, when the first Austin car was ready for its road christening. A new era in motoring had opened.