The newish Steyr 256 sounds like a great candidate. Austrian rather than Italian, but what's a little border war between friends
Indmar is selling them as Indmar 256 and targeting the ski boat market.
708 lbs and offering 250 hp out of 195 ci, and 500 ft/lbs of torque at cruise, it looks to be a hell of a motor combo hooked up to a 200 lb Bravo series or a V-P Duopro...check out the details keep in mind fuel curve is in liters/hr
http://www.steyr-motors.com/products...engl_oct09.pdf