Opel 12.3 liter (therefore <a href="//commons.wikimedia.org/wiki/Category:Number_123_on_racing_cars" title="Category:Number 123 on racing cars">number 123</a>) racing car <i>Grünes Monster</i> (<i>green monster</i>), built 1914.
<p>Inline-four engine, four valves per cylinder, 260 HP, top speed 228 kph / 142 mph.
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Driven by <a href="https://de.wikipedia.org/wiki/Carl_J%C3%B6rns" class="extiw" title="de:Carl Jörns">Carl Jörns</a> in the 1920s.
<p><a href="//commons.wikimedia.org/wiki/User:Spielvogel" title="User:Spielvogel">Spielvogel</a>
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<dl><dd>For a gallery of some more of my uploaded pictures you may see:  <a href="//commons.wikimedia.org/wiki/User:Spielvogel" title="User:Spielvogel">here</a>.</dd></dl>
CC BY-SA 4.0
<span class="int-own-work" lang="en">Own work</span>