Background
Just try to imagine a world in which the E-Type Jag had never existed. We suspect prices of the XJ-S would be considerably higher than they are, in an alternative reality in which Jag’s 1975 coupé didn’t live forever in the E’s silky shadow.
Bad news? Not of you like the Jag XJ-S, no – and we love it. E-Types are lovely things but how can one relax driving round in something worth around the same as the average UK house? Are you really going to leave that in Sainsbury’s car park? The XJ-S, on the other hand, is a much more affordable classic Jag, and one you can actually use.
In the late 1960s the design for project XJ27 was initially started by Malcom Sayer. The design was never finished and was taken over in 1970 by the in-house Jaguar design team, headed by Doug Thorpe. The 5.3 litre V12 coupé finally made its debut on the 10th September 1975, and was named the Jaguar XJ-S, with a top speed of 143mph and a 0-60 mph in 7.6 seconds. But boy was it thirsty.
By the early 1980s Jaguar dealerships in the US were pressing Browns Lane hard to produce a convertible version of the XJ-S to satisfy customer demand. But the combination of financial insecurity coupled with fears such a car wouldn’t meet stringent roll-over safety criteria led Jaguar to develop a halfway-house open-top model, the XJ-SC.
Instead of a true convertible the XJ-SC featured a pair of removable Targa roof panels that slotted into the top of the windscreen and clipped into an extended B post that formed a new roll-over hoop. The front and rear window frames remained. This new model gave XJ-S customers the wind-in-the-hair driving experience (except in the US – the ones who had actually asked for it) and showed Jaguar there was a larger market for an open-top XJ-S.
The XJ-SC Targa model took a great deal of engineering, as simply deleting the roof would cause the Jaguar’s monocoque to sag in the middle. The solution was to remove some of the roof but leave the strengthening framework in place, and then make panels which would clip in place. This made the Jaguar as close to a full convertible as possible, until 1988 when the full convertible made it to the production line.
In 1991 under Ford’s ownership Jaguar refreshed the long-serving XJS (now without the hyphen) with a significant mechanical and aesthetic update, most notably the introduction of the new 4-litre AJ6 engine, later finessed into the AJ16 in 1994. This update marked a shift toward improved performance, reliability, and refinement, helping to modernise the XJS for its final years of production.
The AJ6 offered smoother power delivery and hugely improved fuel efficiency. In 1994, this engine evolved into the AJ16, an updated version featuring a revised cylinder head, distributor-less ignition, and improved Bosch engine management. The AJ16 further enhanced the engine’s responsiveness and reliability, making the XJS more competitive against contemporary luxury coupés.
Alongside the mechanical changes, the 1991 facelift also brought visual updates: smoother bumpers, revised taillights, and a better-appointed interior. These refinements helped breathe new life into the ageing XJS, extending its production through to 1996.
The AJ16-powered models are now considered among the most desirable XJS versions for their blend of classic style and improved drivability.