Transformers and Car Brands

Probably everyone knows how "grow legs" at the Hollywood fiction saga "Transformers"? Yeah, right, of the eponymous cartoon series 80's. And who knows where legs grow from the classic cartoon The Transformers? From what, so to speak, the test stuff is made Optimus Prime companions?
Resource carinsurance.org carefully examined all the heroes mulseriala and found that they mostly are not transformed into some unmarked cars, and cars of famous brands - Lamborghini, Ferrari, Land Rover, Toyota, Pontiac, etc.