Romania holds a 75–25 advantage over Bulgaria on the Relative Advantage Index, a decisive margin.
The margin is driven by military spending (79% of the combined total, $9.7bn) and economic size (GDP) (77% of the combined total, $383bn).
1 factor — nuclear warheads — could not be scored because the figure is unpublished for at least one side. Those factors are excluded and the remaining weights renormalised, never substituted.
| Factor | Bulgaria | Share | Romania | Weight |
|---|---|---|---|---|
Military spending SIPRI Milex | $2.6bn | 21%79% | $9.7bn | 33% |
Economic size (GDP) World Bank WDI | $113bn | 23%77% | $383bn | 27% |
Active personnel COW NMC | 37.0k | 34%66% | 72.0k | 20% |
Logistics & power projection OurAirports | 9 | 24%76% | 29 | 20% |
Shares are each side's portion of the combined total for that factor. Weights are renormalised across the factors both sides publish — see the methodology. Data read 2026-08-04.
Every combination inside the top 30 of the Composite Power Index.
Bordering states — the comparisons people actually search for.