Jaguar XJ6

Jaguar XJ6 (1968-1973)

“The Greatest car in the world”
The Jaguar XJ6 was launched in 1968 at the Earls Court Motor Show in London and was the last big cat to be introduced under the leadership of the company’s founder Sir William Lyons. The XJ or experimental Jaguar had to be a car to wow audiences as it was a completely new concept to take over were all other luxury saloons built by Jaguar had left off. It was slim and elegant with the 2.8 or 4.2 litre straight six XK-Series engine providing excellent all round performance capable of speeds over 120 mph being much more powerful than the 420 and S Type predecessors.

Its ride quality and interior comfort were unrivalled and soon the XJ6 had developed a reputation of the finest quality and was frequently acclaimed as the greatest car in the world. In 1973 Jaguar introduced the series II offering a number of refinements and improvements with a complete interior upgrade and in 1979 came the III series with styling re-worked by the famous pininfarina, engines had altered with a 3.4 replacing the 2.8. The XJ6 remained in production until 1986 with XK power still at the helm.

Years Produced1968 - 1973
Performance0 - 60mph 8.8sec / Top Speed - 124mph
Power & Torque 245bhp / 280Ib ft
Engine4235cc / straight six / 12 valves
Drive-train front engine RWD
TransmissionFour speed manual / three speed auto

The best of the Jaguar XJ6’s is the original Mk 1 made from 1968 to 1973 but of course they will come at a higher price.


What matters most is the structural condition. Usual places to check are sills, floorpans, chassis members, subframe mounts and rear suspension mounts. A well looked after example should have a good interior so check for sagged seats, any signs of water leaks and general signs of wear. Also check the air con/heater controls to see if they are working as well as the ventilation system.

Under the bonnet

The 4.2 engine is much stronger than the 2.8 so try to avoid the latter. They can burn a little oil so make sure you get good history with the car. Timing chain rattle is bad news and if they break it is a major job. Oil pressure may barley register on the gauge as they can be unreliable. The Borg Warner auto gear boxes are tough and reliable as are the rarer manuals.

If there is any clonking noises whilst driving this could be worn shock absorber bushes and can be easily replaced if not it might be wear in either propshaft or half shaft universal joints if you’re not experienced then it pays to have the car checked by a qualified technician.

INSURING A Jaguar XJ6 (1968-1973)

Cruising in a classic Jaguar may not prove economical when it comes to your fuel bill, it will however be inexpensive to insure. We include both our in-house agreed value service and salvage retention should the worst happen at no extra cost, and with limited mileage and club members discounts our annual fully Comprehensive policy proves excellent value for money. Here are some typical examples of how little your insurance could be.

  • This quotation has been based on fully comprehensive cover, insured only to drive age 60.

Annual premium – £102.30 with a £100 accidental damage excess.

  • This quotation has been based on fully comprehensive cover, insured only to drive age 45.

Annual premium – £102.30 with a £100 accidental damage excess.

  • This quotation has been based on fully comprehensive cover, insured only to drive age 30.

Annual premium – £118.46 with a £100 accidental damage excess.

*NB: All insurance quotes are based on the same criteria: The vehicle being garaged overnight. Accident, claim and conviction free and a limited mileage of 3000 per annum with full use of a main car daily. All quotations are based on an Agreed Value of £15,000. Prices may alter depending on individual criteria.


The Jaguar XK dual overhead camshaft (DOHC) inline 6-cylinder engine was introduced in 1949 and was manufactured until 1992

Mark Wilkinson (Managing Partner of Heritage Classic Car Insurance) says

“The Jaguar XJ6 was make or break back in the late sixties, it was the future of their luxury saloon models and it was of course a great success. This all new model surrounded the XK engine perfectly offering luxury and performance all rolled into one. Jaguar had done it again!”

INSURING A Jaguar XJ6 (1968-1973)


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