In the last series of 1989, Pininfarina returned to its origins, creating a clean and streamlined line by eliminating the appendages that weighed the line; With the disappearance of the spoiler the look is slimmer and definitely appealing. The bumpers are built-in, bulky and of the same color as the body, the brand on the front shield that is revised and obtained from the bumper, the side skirts are replaced by the sideboards. The new interior rear-view mirrors and rear-view mirrors are redesigned to the flagship style 164. The mechanical design remains unchanged and the Spider is offered in version 1.600 with carburettors with AR 01563 engine from 109 hp to 6,000 rpm 2.000 cm³ electronic injection version, the latter equipped with a phase variator acting on the suction shaft. The 2.000 is equipped with a 126 hp motor AR01590 and 120 hp motor AR01588 equipped with catalytic converter and lambda probe.In the last series of 1989, Pininfarina returned to its origins, creating a clean and streamlined line by eliminating the appendages that weighed the line.

With the disappearance of the spoiler the look is slimmer and definitely appealing. The bumpers are built-in, bulky and of the same color as the body, the brand on the front shield that is revised and obtained from the bumper, the side skirts are replaced by the sideboards. The new interior rear-view mirrors and rear-view mirrors are redesigned to the flagship style 164. The mechanical design remains unchanged and the Spider is offered in version 1.600 with carburettors with AR 01563 engine from 109 hp to 6,000 rpm 2.000 cm³ electronic injection version, the latter equipped with a phase variator acting on the suction shaft. The 2.000 is equipped with a 126 hp motor AR01590 and 120 hp motor AR01588 equipped with catalytic converter and lambda probe.

This version is marketed initially for the US market, since 1992 it has become the only version of Spider 2.0. The "Fourth Series" was produced in (18,456 specimens) and sold in three versions: 1600 with carburettors, and 2000 ie. And 2000 i.e. catalyzed; All offered with the ability to have the hard-top unchanged compared to the "3rd Series" as an accessory.

In the early 1990s, the colors of the classic "Red Alpha", "Black", "Metallic Gray" and "White" were initially proposed. Since 1991 the color range has been expanded with the addition of the "Red Winner Metallic", many mistakenly confused with the "Red Proteo" (the lightest pearled Red color on the prototype Alfa Romeo Proteo) and the "English Green". All these colors provided the beige interior. In 1992 was also proposed the "Yellow Ginestra" with black interior, interior design which was offered as an option also with the other colors since 1992. It was offered as optional the possibility of having completely red leather interior, in combination with the "Black "Or with the" White ". One of the first prototypes was presented in Pink color in 1989, a Red Proteo prototype was also made with red leather interior, a metallic green prototype with sand leather inside and a blue prototype with a blue leather interior.