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That's what I vaguely remember, too, from my Fana de l'aviation readings... the PW1120 was a heavier, more rugged, less efficient variant of F110. Kind of big brute of engine, not very refined. At the beginning Israel probably wanted a F404 and some kind of Grippen LWF, but the Lavi soon took a different path. By contrast a big and powerful engine make sense with Zen suggestion



Either you're nimble & lightweight with a small engine (F404) or you go powerful to drag a lot of external tanks and drop that to go into air defence mode.

Just ask the Swedes - Viggen to Grippen.


In this context the Lavi is closer from the Viggen, another massive  aircraft with a powerful engine. And just like it, it can go J- (air defence) or AJ (ground attack with a boatload of A2G ordonance and drop tanks).


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