[QUOTE=Anfanuts;7302497]I have read and heard qualitatively that the SZ was MECHANICALLY a "detuned and softened" 75 Evo so it seems logical at one extreme to compare the build to that evolutionary benchmark, and the 75 Quad at the other "base" benchmark extreme, as again, experts say it is VASTLY different from a stock 75 ("No comparison" is spoken). This all notwithstanding the aesthetics of body and interior. My interest is to make some quantitative factual sense of these statements. Clearly misunderstood cars by many. Ed, Humberto and guys like Gabor I am informed have many of the answers. I know my way around 105's reasonably well but personally have no knowledge of transaxle cars. Just trying to better understand the "evo"lution . . . ;-)[/QUOT
Please dont understand me as a critic, I like Alfa history and also like the history correct and not coloured of hearsay and sellers possibly misunderanding of background history.
I was at the time of release of this car very interested as it was the top of the 162 range with many improvements of the basic transaxle.
Also I have the SZ book and Pianta´s story about how they developed the car making different versions to see what would work on the road. That in my mind does not say that the SZ i a detuned 75 IMSA race car. You need to read between the lines and evaluate what actually came across from the IMSA racer to the road car. So its not the engine of course, not the the de Dion axle, not the rear brakes, not the body of course, not the front brakes, not the gearbox. The only thing I can see nearly related to the IMSA is the front coilover, but I am sure no comparison in spring strength.
However if you compare with the 75 you see more likenesses - some strenghtened parts(de Dion tube) even the mid support of the Watt links are offset and not center as on the racer. then ventillated inboard rear brakes( instead of outboard) and no adjustable camber like on the racer. All in all what I see is improved 75 parts, but not really from the racer. So if somebody said detuned racer, thats not what the SZ book said!
Any way I think Alfa Romeo was not so interested to make a racer for the road, but having sporty features from the racecar that would work on the road.
Here a rare occasion when a fan got under the skirt of an IMSA racer.
With possiblity to compare the anatomy of the two cars.
ALFAGTV6.COM ? View topic - IMSA 75 detailed pics (original factory car) at Swartkops SA