Restomod candidate

Our 1972 XJ6 Series 1 acquired on March 24, 2017 sits on a car trailer

Owner’s initials

We acquired a superb 1972 Jaguar XJ6 Series 1 — 4.2 litre engine, left-hand drive, short wheelbase chassis with a Borg Warner automatic transmission and factory-installed air conditioning — after evaluating many different saloon candidates.

This well maintained one-owner XJ6 was purchased by Robert “Bob” Franklin Daniels of Camp Hill, Pennsylvania and his initials in a fancy script still adorn the front doors.

The Heather-colored XJ6 at a 2016 car show

Towing the XJ6 on a car trailer

The Series 1 XJ marks the end of the Lyon-inspired classic Saloons. Its birthing was quite rocky in the late 1960s: brutal British labor disputes caused quality problems and raw feelings retarded Jaguar’s progress on my fronts. Engineering and styling tended to be outstanding, but execution lagged behind with issues from terrible paint jobs and poorly fitted parts to repeated component failures attributable to British subcontractors like Lucas (AKA “Prince of Darkness”).

With its period-correct 1972 Jaguar Heather paint color (a sort of reddish brown), optional power windows, heated rear (backlight) window, and vintage fog lights, this survivor well represents the XJ6 Series 1 (1968-73), the last car styled by Jaguar founder Sir William Lyons.

Body color

The body paint color is perhaps an acquired taste. Fashionable colors in the 1970s drifted towards the drab with greenish/reddish hues that seem muddy in comparison to the bright innocence of the 1960s.

Options

Our XJ6 also has a few idiosyncratic options like original Lucas fog lights, a manual choke and yellow warning light (apparently required to meet U.S. emission standards in 1972), European style 7-inch headlights with vented rims as well as a seat belt warning light (required for U.S. safety regulations). There is also an air pump powered by a front V-belt that supposedly helped meet the new anti-pollution provisions of the U.S. Clean Air Act of 1970.

Early JVC head unit, the KS-FX270

The center console features a JVC KS-FX270 cassette AM/FM receiver, a notable 1972 enhancement. The golden age of car cassette players, first introduced in 1970 and cresting around 1977, heralded in a significant musical entertainment advance — personal mix tapes.

1972 XJ6 on the lift

XJ6 rear view

Sharing the garage with its Jaguar Mk2 cousin

Engine bay components

The engine bay reflects some of the cobbled together engineering of the 1970s in reaction to emerging environment and safety laws in the U.S., like the air pump for emission control, as well as increasing consumer demands for climate control comforts.

Left side view of XJ6 engine bay (GM Frigidaire compressor option package)

Video of running engine

 

XJ model profile

All XJ models share the following:

  • Fuel tank capacity of 12.0 U.S. gallons per tank for a 24 gallon total
  • Engine driven fan water cooled XK inline 6 engine, except the V12 in XJ12 models
  • 12 volt negative earth electrical system
  • Front suspension double wishbones, coil springs, anti-sway bar
  • Independent rear suspension (limited slip optional on some V12 models)
  • Power assisted disc brakes with solid front and rear rotors (vented front rotors after 1972)
  • Sheet metal monocoque (unibody) construction
  • Rack and pinion power-assisted steering (an option on early Series 1 2.4 engine model)
  • Wheel track 58.0″
  • Vehicle width 70.0″

The comparative table below summarizes the XJ Series 1 through Series 3 models.

Comparative XJ Models
Series Engine Years Production Top speed MPH 0-60 (sec)
S1 2.8 1968–73 19426 110 15.2
S1 4.2 1968–73 59556 119 12.5
S1 XJ12 1972–73 3235 134 8.7
S2 2.8 1973–74 170 110 15.2
S2 3.4 1975–79 6490 115 12.9
S2 4.2|XJ6C 1973–79 69687 119 12.5
S2 XJ12|C 1973–79 16099 140 7.9
S3 3.4 1979–84 unknown 115 12.5
S3 4.2 1979–86 122453 120 10.5
S3 XJ12 1979–92 10500 140 8.4

With a few caveats/minor adaptations, the brake, steering, and suspension systems are interchangeable between all XJ models from 1968 through the mid-1980s. A good late model reference for part exchange is the 1986 4.2 Series 3 XJ6.