In Puławy, Poland: - The old person cars are late 90s economy cars on original plates (so one-owner). Lanos, Matiz, Seicento, Siena, Nubira, 206, Clio, Pride... all that jazz. - The young person cars are 90s BMWs. You'll be hard-pressed to find anyone over 30 in an E39, E38 or E36. 1st and 2nd gen Renault Scenics are also popular among youngsters, but not on the same level. There are also "lower middle age cars" - middle-class cars popular among families without children old enough to drive them. Mainly late 00s/early 10s Japanese SUVs (Outlander, Grand Vitara, CR-V...), but also Volvo V70s.
Old people cars here are usually slightly older cars, like YD1/YD2 MDXs, or early/mid 2000s GM/FMC/Chrysler vehicles. As for young people cars, they're often or not 2010s average American traffic cars, mostly minivans or SUVs.
Simillar to @Mullethead, young people near me usually drive camrys and civics, while seniors routinely drive early to mid 2000s luxury cars, typically SUVs.
Older: Various, often SUV's like the Toyota RAV4, or every newish Honda Younger: Mostly cheap hatchbacks, usually cars like the Ford Fiesta, Vauxhall Corsa, Mini Cooper, VW Polo, Renault Clio etc
Old people: full-size cars, 2 wheel drive pickups, Buick’s, small crossovers/SUVs Young people: lifted trucks, jeeps, ricers, beaters, their parents cars
Old people usually drive old cars, like Mk2 Golfs, all sorts of Zastavas (mainly Yugo, 101, 128 and Florida), but it's not rare to see them driving a Astra G, Corsa C, Nissan Micra, etc. Younger people mostly prefer German cars, usually VWs, BMWs and Audis. Passats B6 and B7, Audi A4, mostly 2nd, 3rd and 4th gen, Golf 4, 5, 6, BMWs E90 and E46, etc. Also, it's not rare to see younger people to drive Mk2 Puntos, Corsas C and D, Fiestas, Clios because these cars are cheap to run, and also they are nimble, so they're good for city driving. Some also drive MPVs, mostly people who have children.
Older people drive mostly some rusty ass muscle car or some old pickup Younger people drive tipical sedans and hatchbacks
Old people drive either Old cars, like 90s polos, cavaliers, early 2000s modeos and vectras or brand new cars , usually crossovers Young people drive mid-early 2000s hatches like fiestas, corsas, puntos, mini coopers or cios
DK: Older people: Something old that they had since new, or typically French or German cars. Younger people: Seat Altea, Seat Leon, Golfs, Polo, basically anything VAG or BMW.
Older people: Usually a SUV or some D segment wagoon. Most likely a diesel. Younger people: If they have a company car... see above. If they dont.... usually a compact car with arround half of them being diesel.