frame # 943004 engine# 243443 ESA
In the twenties Triumph had to fight hard for their market share.
Their answer to the competitors was a basic 500cc bike: it was very cheap – £42.17s.6d.
The type SD, also a 500 cc side valve single, was £83.00.
By using new mass production methods labour costs were cut.
There were some teething troubles with engine and clutch quality in the early series; when these problems were solved the design turned out to be very practical. More than 20,000 Model Ps were sold.
Compression ratio is 4.1 to 1, top speed about 54 mph. This machine was first registered on May 17, 1926 and was owned for many years by a Mr. Alex Fanning, a gamekeeper on an estate near Kingussie, a small town in the Highland region of Scotland.
It was sold to a Scottish motor museum in 1972 and has since been restored.