Initially, the "K" type engine developed in the 1930s were offered in I4, I6, I7 and I8 variants, had 2-valve cylinder heads and ran at 600-680 rpm.
In its early stages, the "K" type engine, created in the 1930s, came in various configurations – I4, I6, I7, and I8 – with 2-valve cylinder heads and a speed range of 600-680 rpm.