The VAM cars had trim, interiors, and model names that differed from the equivalent AMC-made models. All engines built by VAM were of AMC design, modified to deal with Mexico's lower octane gasoline and higher altitudes. The VAM Gremlin was the only car line of its time not to be available with VAM's version of AMC's I6, due to the economy market segment focus of the cars. This is exactly the opposite case as the AMC Gremlin, which was offered with the option of a 304 V8. The three-speed manual transmission with overdrive, the four-speed manual transmission, the V8 and Audi four-cylinder engines were never available. Trim levels and versions like the two-seater, the Levis Gremlin, the Gremlin Custom, and the Gremlin GT were also never available.