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Jaguar Mk. X

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Jaguar Mk. X

1961 - 1970
United Kingdom
6 cyl.
3781/4235 cc
265 bhp
4 spd. man 3 spd. auto
Top Speed:
193 km/h
Number Built:
2 star
Jaguar Mk.X
Jaguar Mk. X
Reviewed by Unique Cars and Parts
Our Rating: 2


This car still holds the title as being the broadest British production saloon being 1.93 metres across its rear. It offered independent suspension and power-steering and was half the price of its rivals.

Originally it was fitted with a triple-carburettor 3.8-litre XK motor used in the E-Type, but this changed to a 4.2-litre unit in 1964 that resulted in more torque but with identical power which was enough to push it to 193 km/h even in automatic.

In fact, the auto version was consistently faster than the manual, beating 10 seconds at getting to 96 km/h. This car could achieve this despite being a lavish 5-seater and having an enormous boot as well.

Unfortunately, consumers never really took to this gentle giant causing Jaguar to conduct a mid-term name change when the 4.2-litre was released, to inspire sales.

In 1966 the Mk. X became the 420G which caused a bit of confusion with the S-Type 420. The "G" apparently stood for "Grand", and although its shape was the same it did boast bright metal beading along the cars sides. The grille was different too, with a thick middle strip. The interior had a timber dash rail with lateral-supportive seating.

The final 420G's were assembled in 1970, but it lived on in the big DS420 Daimler Limousine which used a stretch version.

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Also see:

Jaguar Heritage
Swallow Sidecars - The William Lyons Story
Jaguar - A Racing Pedigree
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Posted 1600 days ago
The 3.8 Mark 10 set the standard for the entire worldwide motoring industry. Too advanced for most consumers to understand at the time, also, far from affordable. Sales vastly outperformed that of its stablemate, the 3.8 E type. Speed limits were introduced on the M1 in the mid sixties and along with this came the much lower revving 4.2. The 3.8 Mark 10 remains one of the fastest and best handling 6 cylinder cars ever made. Interestingly its rear suspension lived on until the Aston Martin DB7. One of those rare cars where driving becomes a pleasure.
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