Beardmore Halford Pullinger

The acronym BHP comes from the surnames of the three key individuals involved in the development and manufacturing of the engines; William Beardmore, Frank Halford and Thomas Pullinger.

The name B.H.P is derived from surnames of three people:[1] Beardmore started building aero-engines in 1913 when the group acquired the rights for licensed production of the Austro-Daimler 6.

Arrol-Johnson (a Beardmore subsidiary involved in automobile production) produced the Austro-Daimler 90 and 120 hp engines at their facility in Dumfries, Scotland.

The 120 hp engine was further developed at the Arrol-Johnson works with inputs from Frank Halford who was assigned to the firm as a liaison officer.

[4] In British military service both Siddeley and Galloway built engines were known as the 230 hp BHP although they had different dimensions and few interchangeable parts.