It is correct that Ferrari needed assistance to have the Formula 2-engine homologated as a "street-car", this required that a minimum of 5000 engines had to be built per year. Ferrari alone did not have the capacity to build this many cars, so Agnelli entered the scene and saved Enzo's day, so to say. The handshake between the two really was the hour of birth of the Fiat Dino.
The first model to be produced was the Pininfarina-designed Spider. It's 2-litre engine came directly from the 1967 Ferrari Formula 2 race car. This V-6 is set at 65° and has a total piston displacement of 1987 ccm. It is fitted with 4 O.H. camshafts. The Dino Coupe, designed by Bertone, was introduced one year later. Ferrari used the same engine in the 206 GT. The two first numbers of the model code implies the piston displacement (2 litres), the third the number of cylinders (6). In 1969 came the 246 GT and it's spider version; the 246 GTS. Like before, the name indicates that the engine had undergone some changes; the main change being the increased cylinder volume: 2418 ccm. All the engines were produced by Fiat, and, of course, the 2.4 litre engine was used in the revised Fiat Dino models. In 1969 the Ferrari Dino saw the light of day, also equipped with the 2.4 DOH 65° V-6. The Dino family were all produced up to 1974.
Now for the 130: The planning for a replacement for the aging Fiat 2300 had been going on since 1963. Fiat's 6-cylinder cars had sold well in the 60's, so there was little hesitation to go on with this concept. Lampredi designed a 2866 ccm V-6 at 60° with 2 O.H.camshafts (140 HP at 5600 revs.) for the Berlina (sedan) that was introduced in 1969. To gain more power, the cylinder diameter was increased from 96 to 102 mm in 1971. This provided an extra 25 HP. Pininfarina's Coupe-version was presented this year, and for rather obvious reasons, the dashboard from the Coupe was adopted by the Berlina. I suppose the 1969- 70 models were pretty hard to sell after the revision in 1971... There was a parallel production of Berlinas and coupes up to 1976, when Fiat ended the Executive class era. Farina went on for as long they could get underpans from Fiat, and made the last Coupe in 1977
There were no mechanical changes to the models during 1971 and 77. Production numbers are hard to come by. Fiat never took much interest in such details, and you get different numbers everytime you ask. I've been through the deepest files in Fiat's own library in Turin, but got no wiser. The numbers are loosely estimated as follows: 50.000 Berlinas, 4450 coupes.
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