You could categorize them in several ways:
* By Generation (C1-C8): This is the most common method. There are eight distinct generations, each with its own unique design and platform. This gives us eight "types."
* By Engine: Considering different engine options within each generation would drastically increase the number of "types." Each engine variant (e.g., small-block V8, big-block V8, LS series, LT series, etc.) could be considered a separate type.
* By Trim Level: Within each generation and engine type, various trim levels (e.g., base, Z06, ZR1, Grand Sport) significantly alter performance and features. Adding trim levels as another differentiating factor explodes the number of "types."
* By Year: Each model year often has subtle changes, leading to potentially dozens of variations within a single generation.
Therefore, there's no single correct answer. If you're looking for a simple answer, eight generations is a reasonable approach. However, a more detailed classification based on engine variations, trim packages, and model years would yield a vastly larger number.