You want to "flat tow" it behind a car? The best way is to put the rear wheels on a dolly and then tow the dolly (making sure to lock the front wheels in the ahead driving position of course!). However, if you want to flat tow it, there have been many Alfas towed that way and I haven't heard of anyone doing damage from a 20 mile tow. But, I wouldn't go much further than that.
'Alex' Sandor Csank
When the going gets weird, the weird turn pro! - Hunter S. Thompson 1971
Bianco 1985 GTV6 "Tramontana" (North Wind)
AROC USA, ARCC & CARM Social Media Chair (Facebookie)
Member: A.O.N.E., St. Louis & Capital Chapter AROC, Alfa Romeo Club of Canada (ARCC), Club Alfa Romeo de Montreal (CARM) and Scuderia Non-Originale (SNO)
Facebook.com Pages: Alfa Romeo Owners Club USA, Alfa Romeo Club of Canada ARCC, Club Alfa Romeo De Montreal (CARM)