Above: Privateer Tommy Simister at Southport Sands in 1924, where the car won against much larger opposition, including a 3 litre Sunbeam.
The transfer of No.1 was unusual and was in direct contradiction of the works policy of never allowing their racing cars to leave their clutches – indeed, the winning No. 2 car (and virtually all Alvis racing cars before and since) was eventually taken back the factory to be either dismantled or scrapped. No. 3 was stripped of the racing fairings, registered for road use and raced by the factory, but it is believed that the reason that No. 1 escaped is that whereas the other two cars had racing bodies and, because of axle and braking arrangements were practically undriveable on the road, HP 6161 was street legal and the bodywork bore more than a passing resemblance to the new 12/50 sports cars (which were based on it) and which were now emerging in ever-increasing numbers from Holyhead Road. Indeed, the victory at Brooklands and subsequent appearances and wins by No. 1 and by No. 3 at sprints and hill climbs around the country contributed significantly to the success of the 12/50 throughout the whole of the 1920s.
It is worth noting how advanced these sports cars were, for the time: Typically cars of the period would deliver a top speed of around 40 m.p.h. Alvis gave a written guarantee that the ‘stock’ 12/50 would achieve 60 m.p.h. and having racing cars with the same engines (and, in the case of HP6161, many other visible components) that were consistently beating larger-engined vehicles was a powerful marketing message. Today, approaching its centenary and still in sprint gearing, HP6161 can comfortably exceed 85 m.p.h.
By transferring the car to the well-known and successful racing motor cyclist and Alvis agent Tommy Simister, the car continued to compete and promote the Marque.