** Please Note: No more information has been found by the Compiler than is given here (J1912). The companies and their engines are included for completeness and the hope that someone may come up with additional material.**
Most E.N.V. engines were of the liquid-cooled V-4 and V-8 configurations and were built in both France and the UK (Ae39, J1912). However, it is mentioned (J1912) that the French branch of the firm developed a four-cylinder, 38 hp horizontally-opposed engine.
The only information found (J1912) is mention of a Schlumberger four-cylinder, two-stroke cycle, horizontally-opposed engine.