Why is the skyline gtr34 so fast compared to other highend european or
asian cars when it only has a straight 6? What is so good about it
that makes it not only expensive, but a winner on the streets? Can
anyone answer these questions and provide me with the important
specifications of the car?

The R34 Skyline GT-R in stock form is not as fast (straight line
acceleration) as it's hyped up to be.  Stock, the car has 276 bhp @
6800rpms and 216 lbft torque @ 4400rpms.  With a curb weight of over
3600 pounds, it sprints 0-60 in about low 5 seconds (thanks to
ATTESSA, Nissan's all-wheel drive configuration that works as 100%
rear wheel drive under normal driving parameters, but power is
transferred to the front wheels once slip is detected.  I believe max
power transfer is 40-60 F-R).  The RB26DETT motor in the Skyline
responds well to modifications, which is why in auto racing videos,
the cars are ridiculously fast.  The combination of an engine that
responds well to modifications (and also has tons of reputable
aftermarket parts available) plus a drivetrain that is capable of
handling its hefty curb weight make the GT-R an excellent sports car.

Hope that answers your questions.  www.exvitermini.com has more
technical information as well as videos regarding the R34 Skyline if
you are interested.

Because it either has a very high axle ratio (ex. 5.13) for 0-60, or a
lower gear ratio (ex. 2.18) for top speed.  Even though the engine is
only a straight 6, the axle ratio can have an enormous impact on
either acceleration or top speed.

-Jim

as a follow-up, also the Skyline is a highly modified street racing
car.  The axle ratio has been changed as a result of putting a better
rear/front axle in the car.  NOS is a big factor, also.  A stock
Skyline would not preform like this.

NOS, are you serious? well any way, the car has a ridiculously stround
that has survived modifications up to 600hp stock. plus twin turbo
responsiveness is good.  ATTESSA is a big factor. the skylines engine
was made for greatness then tuned down