How would Nelson's Trafalgar fleet fare if sent back to face the Spanish Armada?
Short answerIt would annihilate the Armada because of its vastly greater firepower, rate of fire, and mature line-of-battle warships.
NotesThe mismatch in rate of fire, shot weight, and purpose-built warship capability would be overwhelming. The technological gap is compared to placing a modern fighter against a Second World War aircraft. Nelson's first rates alone may carry more usable guns than the Armada's warships, before the rest of the Trafalgar fleet is counted. The encounter would be a rapid technological rout rather than a balanced test of Nelson's tactical skill.