Otto 27/85PS, built at Starnberger Automobilwerke

[nicanary]

Diesel ?

[grobmotorix]

We´re coming veeeery close now!

[Bill Murray]

Otto??
Bill

[grobmotorix]

LOCKED for you.

Can you give me a model name?

[Bill Murray]

Hi Burkhard:

I am well and truly caught out here and please unlock the puzzle.

I ran across the " Otto car" some time ago on another search not connected with this puzzle and just barely remembered some details.

As I remember, a coachbuilder built a car, perhaps for the Otto family, I really am not sure.
I believe it was in the 1924/1925 framework and I believe it was a "one off".

I think the builder was perhaps Swiss but I could be mistaken.  Sadly, I did not save the photo or any other details.

Hopefully, someone with more knowledge of the era can finish the puzzle.
Bill

[grobmotorix]

O.K.

Open for all again.

[ropat53]

 Does it have a Hiero E or Hiero 6 engine made by Otto Hieronimus?

[4popoid]

I'm not sure how applicable this is, but, according to Wikipedia, the Otto-Mercedes was produced about 1923 by the Starnberger Automobilwerke, founded by Gustav Otto, son of the four stroke engine inventor Nikolaus Otto.  Gustav Otto was involved in airplane manufacture, as well as automobiles, but apparently suffered from depression all his life, and committed suicide, at age 43, in 1926, after a messy divorce.  I have been unable to locate any description of the automobile, other than the Otto-Mercedes.     

[targhediferro]

According to Georgano, Gustav Otto produced some vehicles described as 27/85 PS. Nothing more to add.

[grobmotorix]

Sorry 4popoid, you brought all those correct (and easy to find) facts,

but what I wanted to hear was the model designation.

So this is one more point for targhediferro.

[grobmotorix]

Ernst Udet, WW1 airplane fighter ace at the wheel of another Otto in 1921. At his side Ada Otto:

[Wendax]

Some more pictures of two impressive Ottos:

[grobmotorix]

Wow!!!