#or if I am just springboarding into a tangent (which I don't have a problem doing)

[21st-century-minutiae]

Every mass produced car in the early twenty-first century has a make, model, and year. The make is the company that made the car, such as Toyota, Ford, Honda, etc. The model is the name of the specific line of vehicles, such as Wrangler, Sonata, Civic, etc. The year is the year the car was built (usually it is the year FOLLOWing the one the car was built for marketing reasons). Individual lines of vehicles might be modified over the years, but generally if there is a drastic change in purpose and target demographic, it will be released under a new model instead of a new year of an existing model. Automotive manufacturers will produce many makes at the same time, serving different customer niches.

When speaking of a car, an individual will usually refer to both its make and model. While models are almost always unique across manufacturers (meaning the make provides redundant information), it provides a helpful explanation for people who are not fully familiar with cars. Generally, only the most conventional models are universally known (the Honda Civic, for example, is ubiquitous), but culturally people generally have a sense of the different manufacturers based on branding. For example, Ferrari is a very expensive high end car brand. Ford advertises itself as making practical 'working' vehicles. Honda gives the impression of reliable, affordable vehicles that aren't more than you need. So, conveying Make and Model together communicates more effectively.

Year is used less often. It will almost always be used in the context of buying or selling a car, since different years within the same model line can have different performances, even if they are for the same niche, and the age of a car matters greatly for expected performance. Or it might be used to emphasize age (either in newness or oldness). For particular car geeks, the year of a vehicle conveys even more specific information than the model. For most people in the early twenty-first century, it only conveys the age, and not the specifications.

If you are writing a character that is explicitly interested in vehicles, speaking about cars via their make, model, and year will convey that information well. For individuals who don't think much about cars, the color and general 'type' of the vehicle is more descriptive (e.g. a yellow truck, a blue sedan, a black van). The descriptions a person uses can serve as a form of characterization.

A good gimmick blog adds something to a post. It's why those "I-give-people-x" blogs are annoying as hell, but "Identifying-cars-in-posts" is funny. Identifying a car by a few blurry pixels is humorous and impressive, and the audience gets to learn something.

Plus it can be a punchline. An image of two huge hairy men fucking on the hood of a car is not necessarily humorous, but knowing the exact make and model of the car upon which they fuck can add some character to the scene.