What is a distinguishing feature of the A2 series HMMWV compared to A1?

The distinguishing feature of the A2 series HMMWV compared to the A1 is that it includes newer enhancements. The A2 series was developed to address the operational needs that emerged after the initial deployment of the A1. This includes improvements in armor protection, more powerful engines, and enhancements in the electrical system—all intended to increase durability, reliability, and performance in a variety of environments.

While the A2 may indeed have more variants compared to the A1, the key difference lies in the specific enhancements that were made to improve its capabilities. Choosing the option that highlights these advancements provides a clear understanding of how the A2 series has been refined in design and function for better service in the field. The focus on newer enhancements also reflects the evolution of military technology and requirements.