Just because the 4cyl Dixi was licensed from the Austin Motor company, doesn't mean BMW's 6 cyl automotive motor from 1933 was based on anything Healy. The 'modern' 6 cyl motors are based on the M30 which was derived by adding two cylinders and a 30 degree 'slant' to the (4cyl) M10 in the 60's.

To be clear, the very first inline 6 was made by the Dutch in 1903 (Spyker). The BMW automotive inline 6 was based on the 1917 Rapp Motorenwerk (later called BMW) aircraft motor- the BMW IIIa. The BMW IIIa: Based on Merc's DIIa aircraft motor. The Merc? You guessed it- Ferdinand Porsche's Austro-Daimler aircraft motor from 1910.

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