A shame about AF... I keep begging, but nothing happens... it's been 18 months now.
The version of the engine that inspired this thread, you probably realise by now, was the K3 Magnette engine.
Supercharged inline six with overhead camshaft, 1087cc from a 57mm bore and a 71mm stroke. Lovely thing, it must have sounded great, and it went well enough.
And 120bhp at 6,500rpm was nothing to sneeze at in the early thirties, either!