Back to my EMD reference, on a Tier III (EUI) 16-710G7C rated at 4000BHP/900RPM continuous BSFC is .325 LB/HP-Hr. Assuming 7.1Lb/gal for fuel that gets you to 183GPH, or 21.8 hp/gal.
2-cycle, uniflow scavenged, using a gear-driven centrifugal supercharger/turbocharger with an overrunning...