What does 28 stand for in z28?

In the context of the Chevrolet Camaro Z28, the "28" refers to the model designation for a specific performance variant of the Camaro that was introduced in 1967. The Z28 package was originally created for racing purposes, and its designation is often thought to represent the engine's displacement of 302 cubic inches, which was developed for Trans Am racing. Over the years, the Z28 became synonymous with high-performance versions of the Camaro.