LoL... just cuz some guy puts a "silvia' emblem in the back of his 240, doesn't make it a silvia. I mean not to say that this isn't a "silvia" but you shoulda taken a pic of the front then state your claim.
FYI:
-the '94 240sx's only came in convertible.
-the different set of tires in the back is either for one of three things... one, he's a guy who for some reason can't have matching wheels around... two, the guy uses a different set cuz the tires he prefers in the back are cheaper and probly easier to drift with... or three (and u get a lot of these), a poser who wants to look like a guy who drifts
IMO i wouldn't consider it a silvia (or a 240 with a conversion) unless he had the SR20DET, the front end, the JDM interior, maybe RHD conversion, tail lights, etc... but that's just me.
Now, in downtown San Mateo, in Northern California... looming around 2 am one Saturday night was an actual blue S15 (99-newer) Silvia imported from Japan. Too bad I didn't have a camera, but I dropped a slice of pizza on my shoes in awe. It was like that Altima commercial when it slowly passed by me. BTW it had no license plates and was probly coming back from this place in the Bay Area that I know imports cars.