The Deutz-Fahr TTV range was revamped at the end of 2007. The TTV 1145 was replaced by the 610 and the 1160 by the 620. The most significant change was the introduction of new 6.1-liter four-valve engines with common-rail injection. In the 620’s engine, up to 15 extra horsepower could be delivered under load. The ZF Eccom 1.5 transmission remained unchanged, offering four speed ranges to ensure a high share of mechanical power transfer at the most important working speeds. A top road speed of 50 km/h was reached at 1,850 rpm. The accelerator pedal could be used either in automatic mode as a speed pedal or in the conventional way.

The hydraulic system featured four electro-hydraulically controlled spool valves and a 120 l/min variable-flow pump. Sixteen end-of-field functions could be programmed into the headland management system. The front axle had hydro-pneumatic suspension, while cab suspension was mechanical as standard. There were four standard PTO speeds. Cab noise levels measured 73–74 dB.

In spring 2008, a more powerful stepless model, the TTV 630, was introduced, sharing many components with the M 650. It was larger and in many respects more robust than the other TTV models. Instead of Eccom, the transmission was the S-Matic model, transferred from Steyr to ZF. Hydraulic oil was kept separate from the transmission oil. The 630 could be specified with up to seven electro-hydraulic spool valves. Cab suspension was pneumatic, and noise levels inside the cab measured 70 dB.

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