What is the best car from this?

Bmw m6
chevrolet camaro
nissan gtr
ford mustang

On paper- Nissan GTR
My opinion- BMW M6

Be more specific about which trim the Mustang and Camaro is because the mainline models of those won't stand a chance.

Hi that largely depends on several factors like age and condition and where on this planet you live.
so an american my well prefer a Ford Mustang or the chevrolet camaro. Where as the rest of us who who are not so homophobic would chose other makes in preference.

I would go with the Mustang. I've not had very good service from my various Chevy products, the Beemer is way expensive, and the Nissans have had some bad press recently with switch problems and leaky gas tanks.

We need a car that is as fast as the GT-R, sounds like the Camaro and as well-equipped as the M6… But since no such car exists, I'll have the GT-R, preferably Nismo-tuned and in white please…

I personally like Camarro

GT-R
then it depends on the specific model of Mustang and Camaro but the top of the line ZL1/Z28 or GT500 would be faster than the M6.

The GT-R has awesome acceleration thanks to it's AWD system, double clutch gearbox and amazingly well tuned electronics that control everything. It also has amazing handling because of the same reasons. The GT-R competes with cars many time more expensive than itself in terms of speed. One of the greatest tests of car performance is lapping the nurbugring. A 20+ km tack in germany that has a huge selection of low speed, medium speed and high speed corners along with straights of various lengths that really demand all sorts of performance from a car.

the GT-R has done a time of the nurburgring of 7:08.69.
the Camaro Z/28 (a road legal track focused version of the ZL1 that's all sold out) got a time of 7:37.40.
the Shelby Mustang GT500 got a time of 7:39.28.
this 2 second difference is mainly due to the conditions and driver. On a different track, the GT500 could be consistently faster than the Z/28
The BMW M6 hasn't got an updated time yet but a 2005 model got a time of 8:08.
The M6 might have a lot of power, but they have speed limiters installed and are quite heavy. They are mainly GT cars not really designed for track use.

Best in what respect?

Best straight line acceleration?

Best handling on a race track?

Best reliability?

Best girl getter?

Best fit and finish?