British engineers had also accumulated and published reliable data about the efficiency of many types of engines under actual running conditions; and they vigorously argued the merits of low- and high-pressure engines and of single-cylinder and multi-cylinder engines.
British inhinyero nagkaroon din accumulated at nai-publish na maaasahan ng data tungkol sa kahusayan ng maraming uri ng engine aktwal na tumatakbo sa ilalim ng mga kondisyon; at sila ay masigla argued ang mga katangian ng mga mababang-at mataas na presyon ng engine at ng solong-silindro at multi-silindro engine.