For one, the forces are different. You're comparing the rotational force of a turbine against the reciprocating mass of a piston engine, the forces at high RPM are incredibly strong on a connecting rod.
Secondly, diesel engines are compression/ignition design and are very efficient and make lots of torque at low RPM so there is no need to spin it faster.
CrushAtlas t1_j6iljum wrote
Reply to Eli5 Why gas turbine can rev at >10000 rpm but diesel engine red lone at 3000-4000 rpm? by sepientr34
For one, the forces are different. You're comparing the rotational force of a turbine against the reciprocating mass of a piston engine, the forces at high RPM are incredibly strong on a connecting rod.
Secondly, diesel engines are compression/ignition design and are very efficient and make lots of torque at low RPM so there is no need to spin it faster.