Tractor test: Massey Ferguson 8480 Dyna-VT Massey Ferguson quite clearly set out its high-hp stall when it launched the 8400 tractor series back in August 2004. Boasting up to almost 300hp, this is the flagship tractor line that Massey hopes will start to steal sales from those traditional arable prime mover kings, the John Deere 8030s and Case IH Magnums