Numbers out Friday suggest 2023 proved tougher going for the luxury brand.
Sales dropped 11% over the period, falling to just over 13,500 vehicles.
A year earlier it had posted record numbers.
High-end consumers apparently felt the pinch, with sales down across the firm's top-three markets - Europe, the Americas and China.
Chief executive Adrian Hallmark said "the luxury market was not immune from the challenging market conditions seen around the world".
However, he said Bentley, a unit of Volkswagen, remained "cautiously optimistic" over the year ahead.
Personalization is the big bright spot.
Though unit sales fell last year, bespoke content in vehicles jumped 43% over 2022.
The custom demands command premium prices, meaning fatter profit margins for the firm.
Even so, Bentley's downturn adds to signs that the luxury sector faces falling demand.
Recent weeks have also seen warnings from high-end names including Burberry and Watches of Switzerland.
