Rough calculations based on brief googlage.
Based on assumption of fresh Duracells (capable of 2A output)
Nissan Micra battery has 550 cold cranking amps, so you’d need to provide that.
so
9X aa duracell in series gives (theoretically) 13.5 volts with 2A current.
550 /2 = 275. so youd need 275 rows of 9 cells to give 550amps
so 2475 AA cells is a 9s275p configuration would start your micra.
A BMW 750 battery has 850CCA, so the configuration would be 9s425p or 3825 AA cells.
This is proper rough guesstimation though. 🙂