WesWorld

Currently;

Empty Weight: 55700lbs Maximum Weight: 116600lbs
Length: 130ft Span: 147ft Wing Area: 2150sqft
Engines: 4 x 2860hp Isotta-Fraschini W1518-D RC.64
Crew: 10 Passengers: 50
Maximum Speed: 358mph@21000ft Ceiling: 38000ft
Range: 5000nm

Its still some way away if it ever gets built. I don't really think that Italy can afford two large aircraft projects though so this'll probably be shelved.

Coupled engines according to the drawing or do you have other versions?

There are two engines in each nacelle, each of which drives one half of the contra-rotating propeller independently.