Commonly referred to as the "Series II", the XJ line was facelifted in autumn 1973 for the 1974 model year. The 4.2 L I-6 XJ6 (most popular in the United Kingdom) and the 5.3 L V12 XJ12 were continued with an addition of a 3.4 L (3,442 cc or 210.0 cu in) version of the XK engine available from 1975.
The Series II models were known for their poor build quality, which was attributed to Jaguar being part of the British Leyland group along with massive labour union relations problems that plagued most of industrial England in the same time period, and to problems inherent in the design of certain Lucas-sourced components.
Initially the Series II was offered with two wheelbases, but at the 1974 London Motor Show Jaguar announced the withdrawal of the standard wheelbase version: subsequent saloons/sedans all featured the extra 4 inches (10 cm) of passenger cabin length hitherto featured only on the long-wheelbase model. By this time the first customer deliveries of the two-door coupe, which retained the shorter standard-wheelbase (and which had already been formally launched more than a year earlier) were only months away.