The engine range was extended with 2, 3 and 4-cylinder variants. All of the 3,268 engines that were sold before 1920 to boat owners, fire fighting services, the army, house-owners and other customers had a standard engine speed of 800 rpm.

In 1919 the company was renamed AB Pentaverken. Engine manufacturing dominated this period, but profitability was poor during the depression that followed the First World War.