The Toyota Massy Dyna is a four-tonne medium-duty truck built by Toyota between 1969 and 1979. It could seat three. The chassis was developed by Toyota, with the Toyota Auto Body subsidiary designing the bodywork. Hino Motors did the work on engine, transmission, and clutch. The Massy Dyna was introduced in September 1969. While the Massy Dyna's name related to the smaller Toyota Dyna truck, also of a cab-over engine design, its mechanics were closer to those of the five-ton DA/FA100 trucks. The doors were actually shared with the larger DA115-series cabover models. Originally it was equipped with an inline-six 4507-cc DQ100 Hino diesel engine, with. The petrol F-series engine was also in the lineup, a model which carries the FC10 chassis code. The petrol version was mostly used as a fire truck, as its high fuel consumption made it uninteresting for commercial users. The truck was also available in a somewhat lighter 3.5 ton model, as well as with a longer wheelbase of. The long model received the QC15 chassis code. The regular version has a wheelbase of, and an overall length of. There was also a short wheelbase model, most commonly built as a dump truck, on a wheelbase and with the QC12 chassis code. By 1972 the DQ100 engine had been upgraded and produced at 3200 rpm. In March 1975 the Massy Dyna was updated, and its name changed to "Toyota Massy Dyna Cargo". Capacity was increased to 4.5 tons, while the new EH100 diesel engine was of 5871 cc and offered. The truck also received a very light facelift: the grille was now painted white rather than black and the headlight surrounds were slightly altered. The wheelbase increased to, combined with the new engine this meant a new chassis code: EC20. The EC20 also has triple wipers. There was also the petrol-engined FC20, which appeared a month after the diesel EC20. This has the 4.2 litre 2F engine with at 3600 rpm. The short wheelbase version was now called the EC22/FC22. In March 1976 the Massy Dyna received another slight change, when the fenders on the cab were widened. An extra long wheelbase model was added at the same time. By the time of the 1979 Tokyo Motor Show the Massy Dyna, never a strong seller, had been discontinued in favour of Toyota subsidiary Hino's Ranger.
