I don't think that is a very efficient 'Prime Mover". The fuel used for the work performed ratio is not good. Those larger engines use a lot of fuel and a not insignificant quantity of water too. Not to mention they continue to consume fuel and water even when idling and not performing any work.
One should take into consideration these prime movers have Tier 1 pollution controls and the cleanup of the environment will be up to the owner to accomplish, or otherwise you will be knee deep in combustion products.
They do have a lot of torque on demand, but this could be a problem in that the ground engaging equipment could be subject to shock stress if an underground obstacle is encountered.