Designed by Horace Keane as a converted and modified Ford T engine. In 1919 the 4 cylinder water cooled inline engine produced 40 hp. The 1929 Mk III received ATC 30 and 44.
A 90 hp 310ci 4 cylinder; the ATC 44 was for the 110 hp supercharged model.
The 1930 Mk III Hi-Drive four cylinder inline was inverted. Producing 95 hp from 310ci, the Mk III Hi-Drive received ATC 60.
All Aero 