The 1980's and early 1990's represented the golden age of Fiatagri.
A busy periode, with the roll out of a new corporate identity and structure, in the midst of an agricultural recession, the launch of new models and series, ending with the 2.000.000th tractor being produced in 1989, and the NHGeotech conglomerate in 1991.

It started in march of 1983, at the Fieragricola and Sima international fairs in Verona and Paris, when Fiat Trattori S.P.A went ahead and introduced their new identity. - Fiatagri. 
This not only marked the beginning of a new corporate structure, with Hesston and Laverda becoming an integrated part of the company's "full-line" of agricultural machinery and equipment, but also the beginning of a legend within the agricultural community.

The new color scheme of Fiatagri was inspired by Italian "terracotta" red clay ceramics.
Fiat decided to use red clay as their theme, as red clay in its natural state, depending on conditions, could appear like the orange colors of Fiat, or the red colors of Laverda and Hesston. With Fiat having proclaimed its "marriage to the land" before, it seemed fitting, that the final color would be given a deep and earthy tone.

The new colors were followed up by an all new logo, into which the designers put a lot of research and creativity. The final result showed, and was a brilliantly thought out stylized leaf, that could also be interpreted as a stylized grain axis, or tracks from the tires of farm machinery.
The logo encompassed everything that Fiatagri stood for, and is still used to this day by Fiatagri's succesor - New Holland.

Fiatagri followed up its launch, by introducing five new series of tractors, with 26 new tractors in total. Given the ongoing recession at the time, this was a powerfull move.

In 1984, the first three models of the new 66-series, the 60-66, 70-66 and the 80-66 were revealed, updating the fairly new 66-series platform from 1982 with new engines and linkage control, as well as the HC (High Clearance) version from 1983.
Later in 1985, the 45-66, 55-66 and 65-66 were launched at the Verona and Paris international fairs, including new compact "Speciali" Frutteto (orchard), Vigneto (wineyard) and LP (Low Profile) versions.
Finally in 1990, a spiritual successor to the popular "La Piccola" was revealed with the 35-66.
Though compact, the 35-66 stayed a 66-series tractor throughout its production run, as it was designed to be a very compact utility tractor, and not a "speciali" tractor.

​In 1990, the 66-series "speciali" models spawned the 76-series. The 76-series was based on the
66-series "Speciali" tractors, but received an upgraded driving position and transmissions.

The 66-series also spawned the 46 and 56-series, which were based on 66-series models.

The 80-66, including its 70-66F sized "Frutteto" version, became Italy's best selling tractor in the 1990's, and one of the best selling worldwide, only surpassed by Fiats 640.

All Fiatagri products were now sold internationally and domestically under the Fiatagri brand, with the individual manufacturers brand only, but proudly, located on the sides of each machine.
In the case of Fiatagri's 66-series tractors, that was the Fiat brand.
Except for North America, where Fiat tractors were still sold as Hesstons, making for at sometimes awkward situation, with Fiatagri, Hesston and Fiat branding, all on the same tractor. 

The 66-series used the strong and proven stressed chassis design, tracing its roots back to the Golden Ribbon series, but with essentially new engines, based on the 8035 and 8045 engine-series.
New innovations in fuel delivery and swirl of the air-fuel mixture, insured more power at low revs, and a 30% reduction in fuel consumption compared to the engines predecessor. A remarkable achievement.
The only tractor in the series that didn't use a Fiat developed engine was the 35-66, as Fiat didn't have an engine with the right combination of small dimensions and power output for a tractor of this size. The engine fitted to this model came from Lombardini.

The standard transmission available for the 66-series was a new fully synchronized 12 forward and 4 reverse, with the option of a 20 forward and 8 reverse creeper transmission, or a 12+12 shuttle unit.

Linkage and draft control functions were the same as on the larger 90-series, including the automatic "Lift-O-matic" raise and lowering system. This made the 66-series an advanced entry-level tractor.

The 56 and 66-series remain in production to this day through New Holland's partnership with Türk Traktör, as a testament to the timeless engineering and appeal of the Fiatagri-era of tractors.