The ACRISS Car Code Algorithm
History
ACRISS members identified the need for a common vehicle classification and rating system across European car rental markets to ensure greater consistency when customers rented vehicles from different suppliers.
To support this objective, ACRISS commissioned independent industry experts to develop an algorithm to support and create a standard vehicle rating system. This resulted in the creation of the ACRISS Car Classification System and the internationally recognised ACRISS Car Codes used throughout the car rental and mobility industries today.
The ACRISS Algorithm
Each new vehicle model — including engine variant and trim level — is assigned a rating using a proprietary algorithm designed to provide consistent and accurate vehicle categorisation.
Vehicles are rated on a points scale, typically ranging from 0 to 10 and, in some cases, higher for premium or specialist models. The algorithm considers a number of key vehicle characteristics, including:
- Manufacturer list price
- Engine performance and horsepower
- CO₂ emissions
- Vehicle size and dimensions
- Luggage capacity
- Number of seats
- Features and equipment levels
Based on the calculated rating, vehicles are assigned an appropriate ACRISS vehicle category. For example, a vehicle such as a Volkswagen Golf would typically fall within the Compact category.
Where a vehicle exceeds a defined threshold within its category, it may be classified within the corresponding Elite category, identifying a higher specification or premium version of a similar-sized vehicle.
For SUVs, MPVs, and passenger vans — particularly vehicles with six seats or more — the classification system also places additional emphasis on seating capacity and passenger configuration.
This structured approach helps ensure more accurate “like-for-like” vehicle comparisons, improving transparency and supporting informed booking decisions across global rental platforms.