Just wondering, here in america people have mustangs, camaros, Nissan Z’s, wrxs, and lancers. Do you see any of these cars in their country? If not what are the more popular sports cars people drive around and customize there?
None of those are sports cars in the traditional sense.
Anyway, they don’t. Though for comparison’s sake, only the Mustang usually makes it into the US top 50 for new car sales.
From what I remember, mostly BMWs, Mercedes, Audis, and the occasional Porsche. You can get an idea here of what is being sold on the used market for coupe/sports cars. I don’t know how big the customization scene is there, though.
Not sports cars? What planet ate you from?
They aren’t sports cars in the traditional European sense (maybe the Z qualifies.) In Europe, a sports car features nimble handling, not acceleration.
This one.
Exactly. We would call something like a Mustang a “muscle car”. Good if you want to drive a quarter of a mile in a straight line quickly. Not good if you want to make like James Bond on roads like this.
Popular sports cars in Europe, Poland included, are Ferraris, Porsches, maybe an Audi R8. that kind of thing. Out of the list you mentioned, the Nissan 350Z and maybe the Subaru are about the only one I see on a regular basis (in the UK).
The impression I get from my Polish friends is a general love of German cars. If you want a proper sports car you start with a Porsche 911 and then work your way out.
Customisation isn’t a big thing in Europe. Not in the sense of major after market mods. If people have the money they will go for a higher spec car. There is no limit to how much money you can spend with the high end manufacturers with ever more insane and expensive go fast options. The likes of BMW’s M series, Merc’s AMG relationship. Whereas Subaru can sell you an STi WRX, or Mitubishi an Evo Lancer, this is small change compared to what AMG or Porsche can do. 911 GT3 or SL 65 anyone? Messing about doing after market customisations will simply wipe value off.
To be really pedantic , a sports car is a car which you use to compete with. So it should be viable as a track car, and to be more serious, there really should be a class in which the cars compete. Very hard to go past a 911 in that case. Not that the vast majority of owners ever actually do track their cars.
That’s not pedantic. It’s wrong. A Mazda MX-5 is a sports car but it’s certainly not a viable track car.
Really? I owned an MX-5 for many years, and was a member of the local club - many members did indeed regularly track their cars. When I sold it I had a number of offers from people whose entire desire was to track it. There are quite a number of clubs here, and the MX-5 is a favourite platform for a dedicated track car, and has a dedicated class.
On this one I’m afraid you are simply flat out wrong.
If competition is a determining factor then a Renault Clio is a sports car. 
A very quick Google and I came up with the Arrinera. Im no super car fanatic and I doubt you will see one of these being modded like the ever more lumpy and absurd Mustangs Im seeing around here but it is Polish and it definitely is a sports car.
You should have Googled longer. The Arrinera has not actually entered production, and will likely cost upwards of half a million dollars when it does, so I don’t think that qualifies a “[p]opular sports [car] people in Poland drive”.
I’m belaboring an off-topic post, but the Mazda Mx-5 is the most raced production car in the world.
I don’t have a cite, but I think I recently read that one in five race cars on any given weekend in the U.S. is a Mazda Mx-5. People bring them on the track regularly.
I stand properly corrected.
This is not to mention that properly modified Mustangs, Camaros (or even models from the factory like the Boss 302 and Camaro Z-28) are most certainly viable track cars. In the case of the Z-28 and Boss 302, they are purpose built for that very reason.
The original purpose of muscle cars was to serve as a low-cost starting point for creating a proper sports or race car. Different types of driving demand different setups on gearing, suspension, turbo/supercharging, etc. but in all cases, having a large bore engine is a good thing so selling a car with a big engine is, as said, a good starting point for creating a car in accordance with your desires and interests. So by the standard, it’s a bit silly to compare a nice BMW to a Mustang. You’re not really comparing cars across classes. You’re comparing a completed vehicle to one which is simply incomplete.
The classification of “muscle car” and the focus on the quarter mile wasn’t really ever supposed to exist. People were meant to turn them into something better. It’s just laziness and budget that caused there to be a glut (and eventually popularity) of the unmodified muscle cars.
But there should be a few proper race cars that use muscle cars as their basis, out in the world. I just couldn’t say what percentile.