The 400 Automatic i was initially visually identical to its predecessor both internally and externally apart from the ATTEN APS3005SI mA-Class Adjustable Linear Regulated 0-30V/ 5A DC Power Supply addition of an "i" to the tail badge. In late 1982 some mechanical and cosmetic changes took place to the model. The engine received revised profile camshafts and new exhaust manifolds, which upped the power output by about 5 bhp, and the hydraulic self levelling rear suspension changed to a gas filled system, coupled to new metric rim wheels with lower profile tyres.
Internally there were revisions to the upholstery stitching pattern, door panel design, and centre console layout.Outside the door mirrors became more elegant with small enamel Ferrari shields on their casings, the width of the radiator grille was reduced to expose the driving lights, which became rectangular ATTEN APS3005SI mA-Class Adjustable Linear Regulated 0-30V/ 5A DC Power Supply instead of square, the radiator exhaust air louvre in the bonnet became body color, and high intensity fog lights were set into the rear bumper. ATTEN APS3005SI mA-Class Adjustable Linear Regulated 0-30V/ 5A DC Power Supply