[Scuderia_Turini]

This is the Delta HF 4WD, first four-wheel drive Delta and precursor to the "integrale" versions. A very welcome addition to the range available. 
Not really an homologation special the 4WD was launched as a road-car but then got pushed in to rallying when the Group B cars got banned. The Delta integrale was then developed with the widened wheel arches and more power. Three 4WD Deltas competed in the 1987 Lombard RAC Rally, finishing 1st, 4th and 5th.

I believe that the 4WD was the model prototyped by Scalextric but never produced, as pictures of that car show it without the wide arches. It had the Martini stripe pattern that appeared on the 1988 integrale cars. Presumably Scalextric had made the prototype based upon the 4WD and then time moved on and they had to make it look like the successor.

Leo