An experimental Porsche 917... Updated.

Here is a Porsche 917 PA from 1969 with a 908-based body that was used in the Can-Am racing series:

And being a 917, you would expect it to have an H12 engine. But have a look here:

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See the unusual bit? Have a closer look:

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That is an H16 engine.

It was an experimental one-off 6543cc H12 good for almost 800hp. But the turbocharged 917/10 performed better. So this went to the museum and development discontinued.

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Update:

Apparently there was more than one version of this. And since it wasn’t a ‘boxer’ engine, it was considered to be a 180 degree “V12". And displacements for this ranged from 6L to 7.2L.

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Annnd... while I couldn’t find a clip that lets you hear how it sounded, I did find this:

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... with a clip of how other 16 cylinder engines sound.

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