[1] The machine is unique in its design, being powered by a modified Austin 7 automobile engine and gearbox unit, from which a driveshaft emerges on the centre-line of the motor.

George Brough claimed a significant increase in the Austin's power output, but, as The Motor Cycle magazine observed, this was a luxury motorcycle intended for use with a sidecar, not a sports machine.

George Brough chose to use also the standard Austin 7 three-speed gearbox, complete with reverse, driving a prop shaft to a crown wheel and pinion mounted in a specially cast housing.

[4] The twin rear wheels would possibly have been expected to make it difficult to handle, but Hubert Chantrey successfully completed the Land's End Trial on a solo version.

The Brough Superior-Austin Four's greatest success was the publicity generated by the introduction and imaginative marketing of such an unusual motorcycle.

Built by enthusiast Albert Wallis, who started with a few spare parts including a rear bevel box casting, and a pair of original radiators, it was completed with a standard Austin 7 engine and gearbox.