At its birth in 1954, the Alfa Romeo Giulietta was given a "750" series number, which denoted the coupes, convertibles, and sedans with a 1290cc engine and four-speed transmission. The lightweight, high-performance Veloce models retained this number, though it had many specific components that did not interchange with those fitted to normal Sprint coupes and Spider convertibles.
During 1959, a new model, designated "101," was announced. At this time, the Spider's wheelbase was lengthened and a few cosmetic changes were made to the exterior: Convertibles adopted nonopening door vent windows, coupes added a fine egg-crate texture to the center and side grilles, and both gained larger tail-lights.
But the important modification centered around the engine and four-speed transmission. The former switched to a diecast cylinder block in place of the original sandcast component; the latter was housed in a new case first used for a five-speed in the Scaglione-designed Sprint Speciale that debuted two years earlier. Five-speed gearboxes seen today in 101-series Giuliettas are either transplants or -- less likely but possible -- period conversions made with a factory-offered kit.
The 750- and 101-series cars have a substantial number of unique parts that do not interchange. But the differing parts numbers don't tell the whole story: The shift from 750 to 101 production was, as were many other changes to the Giulietta line, gradual, with new items added as stocks of old parts were depleted. As a result, some late 750s and early 101s may not adhere strictly to the official specifications -- no surprise to anyone familiar with Italian cars.
Another change, this one even more significant, occurred in 1962 when a 1570cc engine was introduced and the five-speed was adopted across the board. The new powerplant was taller, so a broad bulge was added to the hood of the low-slung Spider. At this point, the cars became Giulias -- the Giulietta name was dropped -- but they remained in the 101 series.
According to the figures cited by Luigi Fusi in his book All Alfa Romeo Cars from 1910, some 24,084 Giulietta Sprint coupes were built in both 750- and 101-series form between 1954 and 1962. Meanwhile, 14,300 Spider convertibles were turned out. The high-performance Veloce was rarer, with a claimed production of 3,058 Sprints and 2,796 Spiders.
In addition, Fusi reported that 1,366 Sprint Speciale and 200 Zagato-bodied SZ coupes were made. Output of the Giulia Sprint came to 7,107, plus another 1,400 of the Speciale. Giulia Spiders accounted for 9,250 assemblies, as well as an additional 1,091 Veloce convertibles. The late 1300 Sprint, made for the European market in 1964-1965, used up 1,900 Giulia bodies and 1.3-liter Giulietta engines.
Learn about the pluses and minuses of these cars in our final section.