It was powered by the twin-cylinder, V-shape (the angle between the cylinders was 50 degrees), OHV, 988-cc J.A.P. engine. Its peak brake power was 45 h.p. at 4800 rpm, as per today’s assessment (Brough Superior, just as Rolls-Royce, never published official information regarding the engine power of its motorcycle). The parallelogram front fork which was used for earlier models was replaced in this case by a characteristic cantilever fork made by the Castle Fork and Accessory Company (obviously a copy of that on Harley-Davidson motorcycles). Eventually, the front fork of this type was used in all of company models.
At the close of the 1920s George Brough (who had founded the company) started experimenting with “soft” rear-wheel suspension. He chose a concept patented by Bentley & Draper: a non-planar triangle of the rear pendulum and a spring unit under the seat. After 1928 suspension of this type was custom-built for SS100 model and its modifications.
Brough Superior motorcycles were hand-assembled and constantly modernized. George Brough created models which he would love to ride himself, and this was a significant part of their success with customers. When a new and a better modification of the J.A.P. engine appeared, the motorcycle was immediately modernized, for George Brough was comfortable only when getting the best… After 1926, the same was true with Matchless engines which were installed on some of company models.
281 motorcycles with J.A.P. engines were manufactured between 1924 to 1938, and 102 motorcycles with Matchless engines were made between 1926 and 1940.
The motorcycle in our collection has an interesting story. It was previously owned by Dunlop that got it for its 40th anniversary. This machine was used for advertizing and for testing Dunlop tires, took part in many public events. Originally it had the sidecar too, but it did not survive WWII.
Dunlop’s choice was dictated by the consideration that Brough Superior SS 100 was, obviously, the best and most magnificent motorcycle of its time. It was also one of the most well-known models and its fame spread far beyond the British Isles, both way back and until today: Brough Superior motorcycles were many times sold at auctions for very high, record-setting bids.
|Manufacturer||Brough Superior, England|
|Years of manufacture||1924 – 1940|
|Quantity produced, units||383|
|Today’s value||11011,52 $|
|ENGINE AND TRANSMISSION|
|Engine capacity, cc||988|
|Bore & stroke, mm||85 x 85|
|Engine power||45 h.p. at 4800 rpm|
|FRAME AND WHEELBASE|
|Front suspession||Leading-link, with Castle friction damper|
|Wheel size||3,0 х 19|
|Wheel base, mm||
|Ground clearence, mm||
|Seat height, mm||
|Gas tank size, l||
|Maximum speed, km/h||