The figure is a combination of data from the Vietnam Automobile Manufacturers Association (VAMA), Hyundai and TC Motor.
VinFast did not publish its figures for a second month in a row or say why.
In the first 10 months 397,457 cars were sold and auto sales could exceed 400,000 for the first time in eight years.
Dealers have been giving discounts for the end-of-year holiday season and Tet, Vietnam’s biggest holiday, which falls in January this time.
The 2022 Vietnam Motor Show, which concluded in October, saw the highest sales ever -- 2,000 cars -- indicating a revival in demand after two years of sluggishness due to Covid-19.