An updated version of the 365 GT4 2+2 came by 1976 by the name of the Ferrari 400. As with the model it replaces, the name refers to the swept volume of a single cylinder.
To visually differentiate the 400 from the 365 GT4, the first comes with a body-colored chin spoiler, five-bolt fixed rims, paired circular stoplights and the deletion of the emblem from the radiator grille. The interior got more sumptuous, with better seat upholstery, different stitching, patterns and slightly changed switchgear. Leather trim and power seats were also available.
The underpinnings of the 400 are almost identical to the 365 GT4 2+2. The car was available in two forms: the 400 Automatic, which was also the first Ferrari with an automatic transmission (Borg-Warner 3-speed automatic), and the 400 GT, coming with a 5-speed manual box. 70% of the customers preferred the automatic gearbox.
The Tipo engine was upgraded to a bigger one and got an extra 20 bhp, the 4.8-liter V12 powerplant producing 340 bhp.
The Ferrari 400 had a top speed of 149 mph and reached 60 mph in around 8 seconds. A total of 502 units were built - 355 automatics and 147 manuals. No US versions were made.
In 1979 the 400 was updated and got a fuel injection system, the model being named Ferrari 400i.