While I agree that 90 minutes at wot did no harm, I do believe that extended operation at wot is bad.
That engine is 2 liters, so 110 hp is 55 hp per liter, not an insignificant amount of load, even for a diesel. Marine diesels fail much more frequently because one of the marine systems lets go and a severe overheat occurs with catastrophic results which is what Ski implied above. These events are the product of lack of maintenance and marine corrosion.
But assuming something like that doesn't happen, the more you load your engine the fewer hours it will last until significant blowby occurs, low compression makes it difficult to start, etc.
The following is mostly speculation, assuming no catastrophic event:
10 hp per liter, 20,000 hours
30 hp per liter, 10,000 hours
50 hp per liter, 5,000 hours
70 hp per liter, 2,000 hours
I base the above partially on the fact that the 370 hp Cummins 6BTA (63 hp per liter) was one of the few high performance recreational diesels to pass the Navy's 1,000 hour endurance test, much of which is at full load.
David