The Valmet 100 series, introduced in the autumn of 1997, is one of the best examples in the tractor world of how small but continuous improvements can keep an outdated model up to date with development. The lineup was updated every few years enough to maintain the interest of buyers looking for an affordable solution. The 100 series itself was a sales success, even though competitors offered models with features like a shuttle gearbox and a quiet cabin for the same money. It is also interesting that competitors only began to bring similar basic models equipped with pedals through the floor to the Finnish market in the early 2000s.

The improvements introduced in the 865 model were expanded across the entire 100 series, including the redesigned cabin, reinforced rear axle, and lifting capacity increased to 3.3 tons with auxiliary cylinders (standard on the 800/900 models). New were the quick shift and an additional heater mounted on the roof—these were standard on the 900. The lineup was now quite clear: naturally aspirated three-cylinder 600, turbocharged three-cylinder 700, naturally aspirated four-cylinder 800, and turbocharged four-cylinder 900. The four-cylinder models had a distributor pump and a muffler placed under the engine hood. New optional equipment included a push-button clutch and an auxiliary fuel tank that increased fuel capacity to just over one hundred liters. The weight had increased by about 350 kilos compared to before.

In 2001, the engines were equipped with an electronic injection pump, and the 800 model was also fitted with a turbo. The torque of the four-cylinder engines increased, and the noise level of all models was reduced to 81 decibels.

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