1925 Grand Prix season

The 1925 Grand Prix season was the first AIACR World Manufacturers' Championship season. The championship was won by Alfa Romeo, utilising the P2 model.

The Indianapolis 500 counted towards the AAA Championship Car title.

Note: To be eligible for the championship, manufacturers had to take part in both the Grand Prix of their country of origin and the Italian Grand Prix.

* Only one dropped score allowed

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