This doesn't seem to be Classroom of the Elite. Just another work by the author and illustrator. The source being from the Classroom of the Elite X account might cause confusion.
The pickup truck is a second-generation Dodge Ram, the car in the bottom right reminds me of a Buick LeSabre with those tailights, and I believe the car above the LeSabre is some kind of 1980s Toyota. My best guess is an A60 Celica, but I'm not confident enough to say for sure.
From right to left; a Volkswagen Transporter T3/Vanagon, a 1991-1996 Oldsmobile 98, a 1981-1989 Lincoln Town car, and I believe the blue car is some kind of Buick. Possibly a 1980s Riviera, although I'm not 100% certain.
Bus at left is Keihan Bus W-1998 (registration 京都200か574), a 2003 Mitsubishi Fuso Aero Star (KL-MP35JM). At right behind the blue Toyota is an Isuzu/Hino Erga/Blue Ribbon II.
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