My '92 Integra didn't come with a owner's manual, and I don't know what model it is. How can I find out? Does it really matter(in terms of adding mods)?

 

If it has VTEC it is a GSR(I think they had VTEC for this year although I am unsure. Someone correct me if I am wrong). If not then it is an LS/GS/RS/SE The only difference in the latter is the trim level. The RS doesn't have a sunroof.

 

when you open your hood, look at the motor, if it has the VTEC name on the motor, you hava gs-r.
Gs is just basically having every option (suspension, rims etc . ) being the same as the GS-R but not having the GS_R motor.
LS is has a few options less than the Gs. It soes not have the stock rims, suspension is the same as the RS, stupid crap like that.
Rs is just the base model integra, no sun roof etc . ..
hope this helps

 

Which has the better engine/motor?

 

GS-R. You would know if you had a GSR, the gearing would be real short, your redline would be higher. You would have alloy wheels, a GSR badge & some other junk.

There were a very limited amount of 92-93 GSRs.

 

The gs-r motor is better, it has more power. but as far as mods are concerned, all nonvtec models (ls,rs,gs), use the same engine (b18a), and the gs-r is the only one that uses a different engine

 

boosting, however, is a different story. It would be better if you had an rs/ls/gs because vtec and boosting dont mix that well.

 

your 92 Integra is not a GSR most likely. if you had one, i highly doubt you would ask if its a GSR. and assuming its not a GSR, the engine you have is a B18B nonvtec.

as for the which trim...depends on minor things here and there. first off, what wheels do you have? hubcaps? 14" 6 spoke alloys? if theyre aftermarket wheels, then forget that question.
do you have leather? if yes, then you have a GS.
is it auto? if yes, then 100% you dont have a GSR.
what color is the car? if its not white/red/teal, again 100% you dont have a GSR.
do you have a sunroof? if not, its an RS.
are your side moldings and bumper moldings body color? if not, then you dont have a GS for sure.
do you have air conditioning? if so, you dont have an RS for sure.

and so on and so on.

we cant tell you what model you have without any specs/options listed.

 

Do they all have back seats? Mine is a blue two-seater. Kinda like a del-sol. The hatchback is right against the front two seats.

 

yes all integras have back seats. You might want to check more into that situation. If there are no back seats in your car it has probably been raced or stolen or some thing of that nature.