I have the geometry for the SIX cylinder, so the following may indeed be useless for the FOUR! The four and six had different wheels/tyres over the vintage period but possibly AC used the same measurements, or thereabouts, for the majority of their steering designs???
· Track: 45½ inches at road (increased to 48 inches in 1927)
· King Pin inclination: 7°
· Camber: 3° (or 4°??)
· Caster: 6°
· Toe in: 3/16 to 7/32 inch
The figures above were measured from an AC blueprint I have dated 1926. The track, caster, toe-in being certain from the drawing, the camber and king pin inclination measured by protractor and may need further confirmation. It was quite common with many marques in the 1920’s to change and modify the geometry, for example by using blocks at the springs, for the likes of sports or competition use. I have not seen any AC figures for the vintage cars in print, so it is worth those above being recorded here on the forum....even if maybe not correct for Uncle Alfred.