The 8100 series was introduced as the successor to the 3600 series, managing to get by with almost as few changes as the smaller French models. The 3635/3645/3655 were renamed 8110 (135 hp), 8120 (145 hp), and 8130 (155 hp). The 3670 equipped with Valmet engines was split into two models: 8140 (160 hp), 8150 (180 hp), and the 3690 was replaced by the 8160 (200 hp), which was 10 hp more powerful.

The most significant technical innovation was the closed hydraulic system, whose output (110 l/min) now matched the tractor’s power class. The transmission was the Dynashift introduced a few years earlier, equipped with a 4-speed power shift. Unlike the smaller models, the reversing gear was mechanical. The clutch had six discs on Perkins engine models, seven on the 8140 and 8150, and eight on the largest model.

The cab was more spacious than before, and the controls were updated. Noise levels were reported as 71-74 dB, but an OECD test measured 78 dB for the 8160. The front axles were new Dana products, and thanks to a 55-degree steering angle, the turning radius was smaller than before.

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