Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 140,143 pages of information and 227,382 images on early companies, their products and the people who designed and built them.
1890 Company founded as National Gas Engine Co.
1944 Producing diesel engines for marine use. 
1950 Brush acquired shareholding in National Gas and Oil Engine Co at cost from Associated British Engineering with option for Brush to acquire the remainder of Associated's holding which would enable Brush to own more than 50% of National. There was some competition in the two ranges of engines but National was recognised as having expertise in gas engines for which there was growing demand.
1952 Company made private.
By 1960 National Engines was a subsidiary of Hawker Siddeley
1961 Manufacturers of diesel, gas and dual fuel engines from 80 to 2400 BHP, free piston gasifiers, generating plant, compressor and pumping sets. 1,300 employees.