1/76 model kit Leyland PD2 Double decker Bus metal kit Bus 1/76 model kit,,,,,,,,,,,,,,,,,,,,,, PD2 (non-London 26-foot versions) The E181 was regarded by Leyland as an interim power unit, a stop-gap until a better power-plant came on-stream, thus the initial post war Leyland lorry so powered was called the "Interim Beaver". The definitive power-plant for full-size post war Leylands began to be fitted to Beavers, Octopuses, Steers, Hippos etc. from 1946. Leyland at this time stopped using the E-number system for engines (at least externally). This new power unit was named after its displacement in cubic inches (US technical influence during World War II led to a standardisation in the British heavy-vehicle market on Imperial dimensions[citation needed] until the late 1960s). Thus was named the Leyland O.
