Okay, here's a 1500hp boat engine.
Nizpro Marine - The Engine - VZR-60, Quad Turbocharged V8 Engine, Ski Race Boat Engines, Competition Engines, Force Boats F21, Race Boat Setups
Only good for 30 hours at that power, but if you backed the power off and use a larger engine, etc, it'd still make far more than any dinosaur aero engine.