Tractor test: John Deere 8530 In conventional tractor configuration, arable prime mover power doesn’t come much greater than that of the John Deere 8530. Its maximum output, when Intelligent Power Management (IPM) is factored into the delivery equation, measures a whopping 274kW/373hp, and it is this stat, in terms of pure performance muscle, that is said to set the Deere flagship apart from the rest of the competition. Our October tractor test expands on this green grunt theme