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1965 Jaguar Mark X

Initially called the Jaguar Mark X (Mark Ten) and later renamed the Jaguar 420G, it first appeared in mid-October of 1961 and was the first Jaguar saloon to feature independent rear suspension. The suspension system, designed by William Heynes, had first appeared on the E-Type and subsequently used on Jaguar vehicles until XJ-S production ended in 1996. The system used double wishbones with coil springs and telescopic dampers. Power was initially sourced from a 3,781cc version of Jaguar's XK inline six-cylinder engine (also courtesy of W. Heynes), but for the London Motor Show in October 1964 the enlarged 4,235 cc unit took over. Triple SU carburetors were fitted, and transmission options were manual or automatic.

The introduction of the 4.2-liter power unit coincided with the introduction of a newly developed all-synchromesh four-speed gearbox. A Borg-Warner automatic gear-box was popular with most domestic market buyers and all export cars left the factory so equipped. The 4.2-liter engine's arrival was also marked by a transmission upgrade for the automatic cars, which saw an upgrade of the Borg-Warner transmission from a DG to a Type-8 unit. Other powertrain features included a Thornton Power-Lok limited-slip differential and power-assisted four-wheel disc brakes. Power-assisted steering was standard on all the later 4.2 cars.

Jaguar had immense success with its XK series of sports cars during the immediate post-war period, ranging from the XK120, 140, and 150 to the Le Mans-winning 'C' and 'D'-Types. In 1956, the company embarked on a new generation of smaller unitary-construction saloons beginning with the 4.2-liter Mark I. The 3.4-liter joined it in 1957 and later by the top-of-the-range 3.8-liter engine which became an option in the Mark II. This engine was ultimately developed into the 4.2-liter unit offered in the super-luxury Mark X model in 1964.

The Mark X succeeded the Mark IX as the company's top-of-the-line model and would remain in production through 1970 when it was replaced by the Jaguar XJ6. As the company's top model, the Mark X was large and luxurious, with a 120-inch wheelbase, a length of 202-inches, a width of 76.3-inches, and a height of 54.5-inches. It was also heavy, tipping the scales at approximately 4,200 pounds. Its size, stature, and standard amenities were aimed at the lucrative United States market, heads of state, film stars, and diplomats.

The styling was elegant with delicate use of chrome trim, rounded body lines, four headlamps set into rounded front fenders, and a vaned grille. It used unitary body-shell construction and its floorpan would remain in production in elongated form even after Mark X production ended, serving as the basis of the Daimler DS420 Limousine.

The Mark X was the largest Jaguar to date and was the last to feature abundant standard woodwork, including the escutcheons, window trim, dashboard, a front seat pull-out picnic table stowed beneath the instrument cluster, and two large bookmatched fold-out rear picnic tables. The large and heavy doors required helical torsion springs inside the door pillars to enable them to be opened from the inside with ease. Air conditioning and a sound-proof glass division later joined the list of options.

The Jaguar Mark X was renamed the Jaguar 420G for the London Motor Show in October of 1966. The main distinguishable difference between the Mark X and the 420G was the addition of a vertical central bar dividing the grille in two. The 420G also had a chrome strip that traveled along the wing and door panels, and side indicator repeaters on the front wings. Minor updates were made to the interior, including perforations in the central sections of the leather seats, relocating the clock to a central position, optional air conditioning, and a padded dashboard.


by Daniel Vaughan | Apr 2021

Related Reading : Jaguar Mark X History

The Jaguar Mark X, also known as the Mark Ten, was produced from 1961 through 1970 and offered in three variations during that time. The Jaguar was offered with a 3781 cc six-cylinder engine or a larger 4235 cc engine. The 3.8-liter engine was more popular with a total of 13,382 examples produced but by 1964 the 4235 cc ruled out by 1964 and became the only offering. The Mark X was the largest saloon....
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Related Reading : Jaguar Mark X History

Britains widest car, the gargantuan Mk X set a record in 1961 that holds even still today. Pronounced Jaguar mark ten, the Jaguar Mark X was the largest saloon built by British manufacturer Jaguar and was originally aimed at the U.S. market. Succeeding the Jaguar Mark IX as the companys large saloon model, the Mark X held the record for being the widest production Jaguar ever built. In many ways,....
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1965 Jaguar Mark X Vehicle Profiles

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Performance and Specification Comparison

Price Comparison

$1,300-$7,000
1965 Mark X
$7,000-$24,400
1965 Jaguar Mark X Base Price : $7,000

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Other 1965 Jaguar Models
$5,390 - $5,600

Mark X

Specification Comparison by Year

Year
Production
Wheelbase
Engine
Prices
120.00 in.
6 cyl., 230.73 CID., 265.00hp
$7,000 - $7,000
120.00 in.
6 cyl., 258.44 CID., 265.00hp
$7,000 - $7,000
120.00 in.
6 cyl., 258.44 CID., 265.00hp
$7,000 - $7,000

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