Stock 91 Turbo stats:

0-60 - 5.9sec
1/4 mile - 14.7sec
weight - 2800lbs
skidpad - .92g
retail in 1991 - $27500
200hp
200lb/ft
7000rpm redline

The full potential of power on the stock turbo is about 300hp.
The full potential of the stock engine is about 350hp.
The full potential of the motor has been undetermined a tuner in Japan recorded 2 792hp runs. You can reliably have over 400hp at the wheels with upgraded internals which is good for 11 second runs on street tires.