Paxman Valenta

The Paxman Valenta was an engine that was made by Paxman diesels for the HST (British Rail Class 43 (HST)), and is still in use in various marine applications, such as the Upholder/Victoria class submarine.

The engine as originally fitted to the HSTs was designated 12RP200L and was a V12 four-stroke turbo-charged & intercooled diesel unit of 79 litres which develops 2,250 bhp at 1,500 rpm. The design of the Valenta was based on the Ventura which was fitted to the British Railways Class 14 diesel locomotives, amongst others.