Agco Power offers two engines, the “44 Md” and “33 Md,” supported by 58 “49 Lftn-D5” series engines. A total of 389 engines are installed on Massey Ferguson and Valtra tractors, representing a share of approximately 15 percent
Before the launch of the latest-generation “Core” series units, the four-cylinder “44 MD” represented the most advanced evolution of Finland’s long-standing engine-building tradition, ensuring robustness, reliability, and performance in medium-duty agricultural and industrial applications, and, in its “HD” version, for heavy-duty use.
The engine features a total displacement of 4.395 liters, making it the second largest in terms of cylinder volume, right behind the individual cylinder capacities of J.D. Power Systems’ “PowerTech” four-cylinder engines.
Each cylinder of the “44 MD” has a displacement just under 1.1 liters, resulting from a bore of 108 mm and a stroke of 120 mm, dimensions that define a stroke-to-bore ratio of roughly 1.1:1.
In terms of performance — and within its reference class — the engine finds its best expression in the Valtra G135 tractor, where it delivers a maximum power output of 107 kW (145 hp) at 2,000 rpm, a rated power of 140 hp at 2,200 rpm, and a maximum torque of 560 Nm at 1,500 rpm.
The fuel injection system, a Bosch common-rail setup operating at 1,600 bar, optimizes combustion for a quick throttle response and high torque available from as low as 1,000 rpm.
Turbocharging is handled by a turbocharger with a wastegate valve and intercooler, while the aftertreatment system meets Stage V emissions standards thanks to an architecture that integrates DOC, DPF, and SCR in a compact, easily installable module. This design enables mostly passive regeneration and eliminates the need for an EGR system, simplifying the setup and reducing maintenance requirements.
In terms of dimensions, the 44 MD is one of the most robustly built units, developing particularly along the vertical axis to minimize transverse and longitudinal space requirements.
Title: Agco Power “44 Md” and “33 Md”: best-selling engines
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