Thank you guys for entering my challenge! I've received a lot of quality car builds!

Honorable mentions:

Ford Rail Bus by @RailfanEthan
Would be better if you add some interior details and slow down a bit
Appearance: 8/10
Performance: 6/10

Toyota Trueno by @Aviation
I like the functions, but the driving performance wasn't that good.
Appearance: 7/10
Performance: 6/10

Hummer H1 by @Gabztar
It looks super cool, but it drifts too much. Also it would be better if you add more interior details.
Appearance: 8/10
Performance:5/10

3rd places

Mazda GLC Hatchback by @KidKromosone
I love those interiors and driving performance, they were so good! Could be better if you make the exterior smoother.
Appearance:7/10
Performance: 9/10

Lamborghini Countach by @Mattangi
Looks fancy! Like those soda bottles! The only thing is that the car bumps while steering.
Appearance: 9/10
Performance: 6/10

Tesla Model S by @WilliamBoeing
It is a very nice car, and congrats on getting 129 upvotes on it. But, the front and rear bumper looks too flat, and it drifts easily, which is not good.
Appearance:9/10
Performance: 6/10

2nd places

Jaguar XJ220 by @Juanfly154
Incredible details! Only thing is it drifts too much while steering.
Appearance: 10/10
Performance: 7/10

Dodge Monaco by @FasterThanLight
Even though it only received 6 upvotes, I still love this one. Really good functions, engine, interior, and texts details! And this car manoevers really well, does not drift that much like others did!
Appearance: 8/10
Performance: 10/10

1st place

T34 Calliope by @BogdanX
Yes, this tank got the first place. It's flawless! Only thing is that the tracks vibrates while using low physics quality (My device is potato so it would actually be my problem)
Appearance: 10/10
Performance: 9/10

Finally, some tips for car builders

We see that steering problems (aka drifting) is the most common problem among those cars. And undoubtebly you guys didn't do anything with wheel tractions when I looked into it. But it's really simple to solve this problem, just remember to add more sideways traction
And rear wheels should have higher sideway traction values that the front ones