In the process of developing the former 8010s into the current 8020 series, John Deere added a fifth model up at the top end, the 8520. The stats make for staggering reading – 217kW/295hp (ECE) rated output and 241kW/325hp max – placing this model at the upper boundary of conventionally configured tractor hp. But does the rest of the 8520 match up?