Tractor test: Massey Ferguson 5445 Slotting between MF’s mid-size 6400 and entry ag 4400 tractors, the 5400 is what could be described as a crossover range – a 55-88kW/75-120hp line that should appeal to both arable, mixed and stock farmers alike. Here we operate the middle member of the 54 series family, the 67kW/90hp 5445, to find out if this design is as versatile as its maker claims