1986 brought a major change: carburation gave way to Weber-Marelli fuel injection, and the Italian market models were now known as the Biturbo i and Biturbo Si. Power outputs increased across the range, albeit at some loss of throttle response. The original square instrument cluster (from 1983 - 1985) was changed in 1986 in favour of a rounded shape instrument cluster. The intercoolers were moved from under the bonnet to a front-mounted position directly behind the grille, making the NACA ducts on the Si's bonnet merely decorative.