Model Variants (Including Prototypes)
Re.2001 - Base series designation; covered two prototypes.
Re.2001 (Serie I) - Standard fighter form
Re.2001 CB - Fighter-bomber form
Re.2001 OR (Serie II) - Proposed naval carrier variant.
Re.2001 CN (Serie III) - Night fighter variant; 2 x 20mm armament underwing.
Re.2001 CN (Serie IV) - Night fighter variant; 2 x 20mm armament underwing.
Re.2001 G/H - Prototype torpedo bomber; two examples completed.
Re.2001 G/V - Updated fighter-bomber form; limited production and service.
Re.2001 "Delta" - Prototype fitted with Isotta-Fraschini Delta RC 16/48 engine; 100 on order cancelled.
Re.2001bis - Prototype