I have it as Alvis 3000 compressor. I found his papers too, with chassis number and some more info. I'll add it as soon as possible.
That's the car! I'm surprised nobody guessed at the Alvis connection - it's described as a 1952 car, so presumably the engine is from a TA21, but the supercharger is the strange addition. Every internet entry for this car is simply a photo with the title of the car, but it seems to be owned and driven by an Italian gentleman.
I have a feeling that this is a fairly recent creation, but no proof. The point is yours.