At the end of 1991, the AgroStar range was expanded at the top end with the 6.71 and 6.81 models, which incorporated a lot of externally sourced technology. The water-cooled MWM engine in the 6.71 was the 6.2-liter unit familiar from Fendt, while the 6.81 had a 7.0-liter engine. The 18+18-speed powershift transmission was produced by the Same Group, as was the hydraulics, which had been supplemented with Bosch electronic controls. Along with the hydraulics, Same also supplied oil-immersed brakes on all wheels, which differed from those on other Deutz-Fahr models. The front axle also came from Same. The tractor’s Agrotronic monitoring system was similar to that found in the smaller AgroStar models. Standard equipment also included, among other things, air conditioning, an air-suspended heated seat, and automatic differential locks.

The largest model in the lineup was the 8.31, which featured Agco hydraulics and a Funk powershift transmission that came with the Allis connections. The engine was the 9.6-liter Deutz used in the preceding 8.30 model. The cab was now also the same as in the Agco-Allis.

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