The Nuffield Organization, Engine Branch, of Cowley, Oxford, UK, was a part of a large industrial firm. They developed this HOAE after WWII and it was the only Nuffield aircraft engine.
O-235 -- {4.375 / 3.875 / 233.0} / {111.1 / 98.4 / 3818}
4cyl; Nuffield 4; 100hp@2600rpm (TO); 1946-1948; Wt = N/A.
The bore and stroke are identical to the Lycoming O-235, although the design had different features.
"Flight" 11/14/46; J47toJ48.
Applications: None found.