DieselEngineMotor.com , if you navigate around , looking for "kubota" stuff, you can eventually find (i did) data for the diesel engines in kubota tractors , even a graph of the hp and torque. At one point you have to select the "Series" of engine .... im considering compact and subcompact ... that series is "Super 05". I didnt know before, but they make a turbo version of the D1105 that is in the B2601's .... like 65lb-ft of torque ! I think also turbo of the D1505, too.