Ogladajac rennlist natknalem sie na ciekawy watek, dla osob poszukujacych Turbo S moze sie okazac pomocny:

"searching for this information turns up bits and pieces, but not a complete list. i'm surprised someone hasn't already come up with this list yet, so here goes.

how to visibly tell a 1988 951 turbo-s (must meet ALL of the below requirements). note that all 1989+ 951's are automatically turbo-s.

visible outside the car;
bigger front brakes from 928s4 (the non-s has front/rear brakes of the same size)
rolled rear fenders to accommodate larger wheels (this can be felt by hand, the non-s will have rear fenders with sharp edges)
turbo-s forged aluminum wheels (not available on the non-s, but easily swapped. beware of immitation d-90 wheels!)

visible under the car;
koni yellow adjustable shocks all around (this was the m030 option on the non-s)
ride-height adjustment threaded collars on the front struts (not sure if this was an option for the non-s)
thicker 26.8mm front sway bar (not as obvious unless you're familiar with sway bar diameters)
metal transmission cooling coil on rear-passenger side (available as option on the non-s)
M030 front hubs and spindles with ABS sensors
Rear trailing arms drilled and tapped for ABS sensors

visible inside the car;
abs (light visible on dash, the non-s had abs as an option)
full power seats for both driver and passenger (available as an option on the non-s)
10 speaker sound system and equalizer/amp. it has different speaker panels on the doors and the EQ below the radio

visible under the hood;
engine designation M44/52
engine number between 47J00001 - 47J01830
adjustable front shocks (available as an option on the non-s)
intake manifold has two vacuum ports instead of one (the one with the 12mm banjo bolt)
chassis stiffening brackets in the front for the struts
ac dryer lines are different to clear the front frame brace on the drivers side.
larger turbocharger (not available on the non-s). how to tell instructions here;
http://www.clarks-garage.com/shop-manual/eng-19.htm

less obvious or not easily visible differences;
larger sodium-filled exhaust valves
progressive springs
larger 25.5mm rear torsion bars
harder bushings throughout
1st gear hardened transmission
2nd gear hardened transmission
limited slip differential (available as an option on the non-s, can tell by jacking the rear of the car and turning one wheel to see which way the opposite wheel turns)
AOR Case Code Transmission: the turbo-s LSD had thicker friction discs and modified pressure cups to accommodate the thicker discs
larger front brake discs (.2" bigger)
different DME and KLR - chips were mapped for the K26/8 turbocharger"

Wiecej tutaj:
http://forums.rennlist.com/rennforums/s ... p?t=386035