I’m checking out this 1990 Porsche 911. The title says “Carrera 2”, the “about this 911” says AWD, and there’s a Carrera 4 on the back, but the Carfax (which lists it as a Carrera 2/4) says it’s RWD. A gov’t site doesn’t list a 2/4 but it lists a 4/2 (could be totally different) which it says is 4WD. Barring any shenanigans (like someone sticking a 4 on the rear) to the car in question, what’s the deal? Is there any reason to not believe the carfax? Did someone really stick a 4 on the rear? Does 2/4 mean “could be a 2, could be a 4?”
Carfax is often totally wrong in their description of what specific model a car is. It looks like they’re describing the car as a Carrera - either a 2 or a 4.
Online car ads can also have erroneous info as well because the seller may not know all the ins and outs of what options were available on that model year or what the car they’re trying to sell has.
It would probably be worthwhile to call up Porsche customer service with the VIN and have them look up the specs on that particular car to find out what exactly it came with.