Well, very few know for sure, but here are the commonly accepted guidelines... in the TA, TS and TL series at least, Iseki used the PTO HP in the model designation.... My TA 210 is 21 HP at the PTO.... a TL 2100 is 21 HP at the PTO, a TS 1910 is 19 HP at the PTO etc., etc.. they then used trailing numbers to sometimes designate 2WD or 4WD but not always....
Anyway, the common logic is you lose about 3-4 HP from the engine to the PTO output measurement ....
So, all this being said the engine HP is probably around 30-31 HP on a TA 270 with PTO at 27 HP... /forums/images/graemlins/smile.gif
Hope that helps..............