Cars ain't my bag... but this thing is cool, old, and I love it! Just take a look at the restoration of this huge-engined Fiat S.76 racer.
Massive 7.5" pistons equalling a twenty-eight litre displacement! I'll leave the rest of the story to the experts.
You can read more about it, and see the engine rebuild pics, at The Old Motor or check out the guy who's been following it from the start, Stefan Marjoram.