Just as an aside, and certainly not even in the same 'family' of cars, but the alt in my '02 C5 is 110 amp, (& made in France
)...the interesting point is that our C5 'cruises' at 1500 -1700 rpms, (not 'high rpms), yet that smallish alt seems to do a good job of keeping the electrical system/batt running well. No food fight, just interesting to me.
Maybe the same engineering group that does the window regs, works on the 'electrical sys' of Xs, on the weekends.
GL, mD