The World Manufacturers' Championship was a competition organised by the AIACR

Fédération Internationale de l'Automobile

The Fédération Internationale de l'Automobile is a non-profit association established as the Association Internationale des Automobile Clubs Reconnus on 20 June 1904 to represent the interests of motoring organisations and motor car users...

 between 1925

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.-World Championship Grands Prix:-Other Grands Prix:-Championship Final Standings:...

 and 1927

1927 Grand Prix season

The 1927 Grand Prix season was the third AIACR World Manufacturers' Championship season. The championship was won by Delage.-World Championship Grands Prix:-Other Grands Prix:-Championship Final Standings:...

.

Scoring system

Unlike the modern Formula One points system, the championship awarded fewer points for higher finishes; the champion would be the manufacturer which ended the season on the lowest points score. A manufacturer would only score points from its highest-placed car. The points distribution is as follows.

Position	Points
1st	1
2nd	2
3rd	3
All other finishers	4
All non-finishers	5
Not starting	6

For the 1925 season, in order to be eligible for the championship, manufacturers had to compete in the Italian Grand Prix

Italian Grand Prix

The Italian Grand Prix is one of the longest running events on the motor racing calendar. The first Italian Grand Prix motor racing championship took place on 4 September 1921 at Brescia...

 and the Grand Prix of their country of origin. One score was also dropped. For 1926 and 1927, no scores were dropped and eligibility was gained by competing in two Grands Prix.

Summary of results

Season	Champion	Wins	Points	Margin (pnts)	Grands Prix
1925 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.-World Championship Grands Prix:-Other Grands Prix:-Championship Final Standings:...	Alfa Romeo Alfa Romeo in motorsport During its history, Alfa Romeo has competed successfully in many different categories of motorsport, including Grand Prix motor racing, Formula One, sportscar racing, touring car racing and rallies. They have competed both as a constructor and an engine supplier, via works entries and private...	2	7	4	500 1925 Indianapolis 500 Results of the 1925 Indianapolis 500 held at the Indianapolis Motor Speedway on Saturday, May 30, 1925....	BEL 1925 Belgian Grand Prix The 1925 Belgian Grand Prix was a Grand Prix motor race held at Spa-Francorchamps on June 28, 1925.-Entries:-Race:- Starting Grid Positions :-Notes:...	FRA 1925 French Grand Prix The 1925 French Grand Prix was a Grand Prix motor race held at Autodrome de Linas-Montlhéry on July 26, 1925.- Classification :-References:...	ITA 1925 Italian Grand Prix The 1925 Italian Grand Prix was a combined Grand Prix and Voiturette motor race held at Monza on September 6, 1925. The voiturettes competed for their own trophy.It was the final race of the 1925 AIACR World Manufacturers' Championship season....
1926 1926 Grand Prix season The 1926 Grand Prix season was the second AIACR World Manufacturers' Championship season. The championship was won by Bugatti.-World Championship Grands Prix:-Other Grands Prix:-Championship Final Standings:...	Bugatti Bugatti Automobiles E. Bugatti was a French car manufacturer founded in 1909 in Molsheim, Alsace, as a manufacturer of high-performance automobiles by Italian-born Ettore Bugatti....	3	11	10	500 1926 Indianapolis 500 Results of the 1926 Indianapolis 500 held at the Indianapolis Motor Speedway on Monday, May 31, 1926. "Twenty-eight cars, groomed to mirror brilliance, wheeled in behind Louis Chevrolet and his Chrysler pace car for the start." -Footnotes:...	FRA 1926 French Grand Prix The 1926 French Grand Prix was a Grand Prix motor race held at the Circuit of Miramas on June 27, 1926.It was the second race of the 1926 AIACR World Manufacturers' Championship season. Unfortunately for the spectators, of all the cars that were announced to participate in the race, only three...	SSN 1926 San Sebastián Grand Prix The 1926 San Sebastián Grand Prix was a Grand Prix motor race held at Circuito Lasarte on July 18, 1926. It was also designated as the European Grand Prix....	GBR 1926 British Grand Prix The 1926 British Grand Prix was a Grand Prix motor race held at the Brooklands circuit on August 7, 1926.It was the fourth race of the 1926 AIACR World Manufacturers' Championship season, and the inaugural edition of the British Grand Prix.- Classification :...	ITA 1926 Italian Grand Prix The 1926 Italian Grand Prix was a Grand Prix motor race held at Monza on September 5, 1926.It was the final race of the 1926 AIACR World Manufacturers' Championship season.- Classification :-References:...
1927 1927 Grand Prix season The 1927 Grand Prix season was the third AIACR World Manufacturers' Championship season. The championship was won by Delage.-World Championship Grands Prix:-Other Grands Prix:-Championship Final Standings:...	Delage Delage Delage was a French luxury automobile and racecar company founded in 1905 by Louis Delage in Levallois-Perret near Paris; it was acquired by Delahaye in 1935 and ceased operation in 1953.-History:...	4	10	13	500 1927 Indianapolis 500 Results of the 1927 Indianapolis 500 held at the Indianapolis Motor Speedway on Monday, May 30, 1927....	FRA	ESP	ITA 1927 Italian Grand Prix The 1927 Italian Grand Prix was a Grand Prix motor race held at Monza on September 4, 1927 and run to Formula Libre regulations.It was part of the 1927 AIACR World Manufacturers' Championship season.- Classification :-References:...	GBR 1927 British Grand Prix The II Royal Automobile Club Grand Prix, commonly referred to as the 1927 British Grand Prix, was a Grand Prix motor race held at the Brooklands circuit on October 1, 1927. It was the fifth and final race of the 1927 AIACR World Manufacturers' Championship season. The race was won by French driver...