I don't know if this holds true for the newer Montanas, but the guy we bought our 4340C from said he sold one of the older Romanian made (re-badged Long) tractors that was rated 65HP to a guy that had a rather cool experience with it. The guy's neighbor had a big implement (can't remember if it was a big hay baler or a large bat-wing cutter) that he was struggling to pull with an 80hp John Deer. The guy takes his 65hp Montana over, hooks up to the implement and takes off with no problems whatsoever. The neighbor says that shouldn't be possible so he hops on the Montana and give it a try and sure enough it pulls the implement just fine. With both guys scratching their heads at this point unsure how a 65hp Montana could out-pull an 80hp John Deer they loaded up both tractors and too them to a dyno. Turns out the 80hp John Deer was only putting out around 73hp to the draw bar, but the 65hp Montana was putting out 85hp!!!
After a little investigating and testing a second Romanina made Montana and getting similar results they decided that either there was a mistake in translation that caused the engine to only be rated 65hp or the enings are seriously underrated due to poor fuel quality in the county of manufacture.
I know that most of the Mitsubishi S4 series engines are slightly under-rated as well. A 45hp Mitsubishi S4E or S4Q engine may actually give you 50hp or over. (Our dozer is an S4E and our 2008 4340C is an S4Q and the engines are almost identical)
