Would full speed have saved Lusitania?

Would Lusitania have avoided the torpedo if she had been running at full speed?

A full-speed target would have been harder, but not impossible, to hit.

World War I torpedoes and sight-based firing solutions gave the submarine a narrower interception window against a faster liner. Zigzagging would add difficulty, but speed alone would still force more precise timing and lead. Lusitania may have been making roughly 21 knots economically rather than about 24 knots flat out, although her exact speed remains uncertain in the discussion. A hit remained possible at either speed and might have produced an even faster sinking if the liner were struck while running harder.