Continuing the six-cylinder theme of this thread... one day I found a mention in Motor Sport of a really neat little twin-cam six. It was made by the French firm of Vagova.
It was built in 1923/24, with a bore of 49.7mm and a stroke of 64mm, it was actually smaller than the Austin 7 engine at 746cc. With twin cams and desmodromic valve operation it was a very advanced little thing and if it revved out I'd reckon it would have sounded really sweet. It also had a 30,000rpm centrifugal supercharger.
But it was a non-starter at the Brooklands JCC 200miler. The Palais du Cinquentenaire was the venue for the Brussels show of 1925, and there a production version was exhibited with the same specifications.
Bill Boddy asks in that article how many might have sold... but I'd love to know if any remain...
Now this is the kind of jewel I can really appreciate!
