HSM

High Speed Motors

HSM behind Singer

The HSM story starts at the Olympia Motor Show of 1934 with the announcement by the Triumph Motor Company of a new model called the Dolomite (the first to carry this name).

It was a very exciting and expensive addition to their range.  Th significant feature was a 1991 cc twin overhead camshaft straight eight engine based on the Alfa Romeo 2300.  It was supercharged with a Roots type blower built by Triumph and developing 120 bhp at 5500 rpm.  This gave the car a very respectable top speed of about 110 mph. 

The transmission was by an Armstrong Siddeley preselector gearbox

The chassis price was £1050 and a complete range of body styles was planned.  However production was cancelled after only 3 cars were made with basic 2 seat bodies.  The myth that Triumph copied the Alfa Romeo engine without permission and were forced to abandon the project is unfounded as Vittorio Jano of Alfa Romeo knew all about the project.

One, driven by Donald Healey was wrecked on a level crossing in Denmark whilst competing in the 1935 Monte Carlo Rally.  At least one of these cars has survived.

Two complete chassis and about 6 engines were purchased in 1937 by Tony Rolt and assembled by David Scott Moncrieff and Robert Arbuthnot and fitted with Corsica bodies.  They were sold in 1938 as the HSM.  At least one of these has survived.