I think that the correct answer to this is:
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Photo © Kar-lok Wong
I believe that Korean Air 773s have the highest power to weight ratios, because they are equipped with the PW4098.
Korean Air was the only airline to order the PW4098 due to the mishap that PW
had with the engine and as a result, they are the only airline to operate the engine. I think that they've even got better power to weight ratios than the 772LR or the 77W.
PARIS, FRANCE...THE BEIRUT OF EUROPE.