The narrow lightweight cars of the previous year having proved so effective, Voisin was determined to secure a second victory at the 1923 Grand Prix de 1923 near Tours. He had not, however, reckoned with the rule changes which the organisers had introduced specifically to outlaw Voisin's ingenious interpretation of the bodywork regulations in the Touring car class for the 1922 race.

Feeling personally affronted by this development, Gabriel Voisin wrote the organising committee a public letter denouncing the stupidity of the new rules; refusing to comply with them, he announced somewhat foohardily his intention to compete in the racing car class instead. This was on December 21st - a mere seven months before the race.