There are linguistic reasons and folkloric reasons for making this connection. It seems there was an island in the Aegean from which the Etruscans certainly originated, and it's not unreasonable that this is the island to which the Trojan refugees fled.

When I say Troy, this is how I understand the Trojan War.

1. Anatolia was dominated by the Hittite Empire, which was hegemon over cities and tribes in Western Antalolia.
2. Troy was an important city-state expanding its influence in the North.
3. The Southwest of Anatolia featured the Achaean tribes.
4. The Hittites contracted/compelled the Achaeans to defeat Troy in light of its rising power. This was the Trojan war.
5. The Trojan refugees fled to nearby Lemnos, becoming known as the Tyrrhenians.
6. These eventually migrated to Etruria.
7. There seems to be a link between the afterman of the Trojan War (which was more of a war to sustain Hittite hegemony) and the beginning of the attacks which led to the Bronze Age Collapse.
8. The Achaeans migrated to Mycenea (leading to its collapse) following the conflict.
9. Rome appopriated Etruria's folklore, claiming Trojan descent itself.

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This seems almost uncontroversial, though perhaps not completely proven.

With all the nonsense theories about Atlantis and other historical, mythological and religious speculation that has occured, I'm surprised that there's not a more assertive movement among either historians or speculators that Etruria is the legacy of Troy. It seems both cultures had a religious fascination with the idea of fate.

Is there merit to this idea?