While the Beetle, Ambassador, Mini, and 2CV each enjoyed more than four decades of production in pretty much their original form, we mustn't overlook the other long-term survivors of the automotive world.

Even 20 years is a long, long time in automotive-design years, and so we've established that as the cutoff for this list. We're not talking about model names that have been around forever (e.g., Crown Victoria, Century, Bluebird), but a particular chassis/generation of a car that remained fundamentally unchanged over its lifespan. We're not including light trucks, mostly because it's damn near impossible to sort out Soviet military stuff.

Obviously, a lot of quasi-arbitrary judgment calls had to be made with some of the candidates- does a different engine or totally restyled body make for a distinct vehicle?- and so we're confident that we've provided something to enrage every one of you, be it a car that totally qualified that we blew off or a totally undeserving car that we sneaked into the list.

For example, were there differences between the first few generations of the Ford Fiesta sufficient to make that car ineligible for this list? We said yes, which Fiesta zealots will no doubt consider to be fatwa-grade heresy. In any case, we've probably made some mistakes, and we've definitely missed some cars that belonged on the list. Fire away with the hate mail, by all means!