In that case, why not just find a suitable sma
High pressure common rail injection is one thing DPFs and DEF, quite another.
Absent government regulations, methinks that manufacturers would design and build diesel engines (and just about everything else) according to market demands. Such has been the case for decades, indeed, centuries. Some engines would have expensive common rail injection while others would not. Few, if any, would have DPFs and none would require DEF. Indeed, engines that are below the mandated emissions HP limit still do not have expensive common rail fuel injection, engine controllers, DPFs, DEF, and other such nonsense. Methinks such will remain the case until government forces change directly or indirectly.