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The Jaguar 420 (pronounced "four-twenty") and its Daimler Sovereign equivalent were introduced at the October 1966 London Motor Show and produced for two years as the ultimate expression of a series of "compactsporting saloons" offered by Jaguar throughout that decade, all of which shared the same wheelbase. Developed from the Jaguar S-Type, the 420 cost around £200 more than that model and effectively ended buyer interest in it, although the S-Type continued to be sold alongside the 420/ Sovereign until both were supplanted by the Jaguar XJ6 late in 1968.
The 420/ Sovereign traces its origins back to the Jaguar Mark 2, which was introduced in 1959 and sold through most of the 1960s. The Mark 2 had a live rear axle and was powered by the XK six-cylinder engine first used in the Jaguar XK120 of 1948. The Mark 2 was available in 2. 4, 3. 4 and 3. 8-litre engine capacities.
In 1961 Jaguar launched two new models with the triple SU carburettorversion of the 3. 8-litre XK engine and independent rear suspension: the Mark X (pronounced "mark ten") saloon and the E-Type sports car. Both cars used versions of the Jaguar independent rear suspension system, the Mark X having a 58-inch (1, 500 mm) track and the E-Type a 50-inch (1, 300 mm) track. In 1965 the Mark X and E-Type were updated with a new 4. 2-litre version of the XK engine, still using triple carburettors.
In 1963 Jaguar introduced the Jaguar S-Type as a development of the Mark 2. It used a new intermediate-width, 54-inch (1, 400 mm) version of the independent rear suspension in place of the live rear axle of the Mark 2. Other differences from the Mark 2 were extended rear bodywork to provide for a larger boot, a changed roofline for more rear seat passenger headroom, a slightly plusher interior and detail differences around the nose. The S-Type was available with either 3. 4 or 3. 8-litre XK engines (only 3. 8-litre in US) but in twin-carburettor form because the triple-carburettor setup would not readily fit into what was essentially still the Mark 2 engine bay.
The 4. 2-litre XK engine of the 420/ Sovereign was fitted with the straight port cylinder head and 3/ 8-inch lift cams. Compression ratios of 7:1, 8:1 and 9:1 could be specified according to local fuel quality, the difference being obtained by varying the crown design of the pistons. The engine was fed by just two carburettors and developed a claimed 245 bhp (183 kW; 248 PS) gross at 5, 500 rpm, which was 20 bhp (15 kW; 20 PS) less than the triple-carburettor version in the 420G and E-Type. The maximum torque of the engine at 283 lb?ft (384 N?m) was virtually the same as that of the triple-carburettor version yet was achieved at 3, 750 rpm rather than 4, 000 rpm.
A novel mechanical feature that the 420/ Sovereign shared with the 420G was Marles Varamatic power steering, which was offered as an option on the 420 but was standard on the Sovereign. Built by Adwest Engineering Co Ltd of Reading, England, it was a "cam and roller" system in which the non-constant pitch of the cam resulted in a variable steering ratio, with the lowest gearing being at the straight ahead, rising rapidly to either lock. The rise in gearing (equivalent to a drop in ratio from 21. 6:1 to 13:1) occurred almost entirely within the first half turn of the steering wheel from the straight-ahead position. The effect was to give very light and relaxed steering at the straight ahead, with quick reaction when cornering. There was no adjustment in the behaviour of the steering in reaction to road speed. A very few of the last S-Types were similarly equipped.
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This is a well known 420G in Jaguar circles owned by the last Jaguar 420G forum co-ordinator for the Jaguar Enthusiasts Club. Known to many as Ronnie this is the 13th from last RHD 420G off the production line at Browns Lane believed to be the newest 420G still on the road in the UK. When new it was owned by Thames ...
- 5th Oct 2021
The 1967 Jaguar 420 featured here with matching numbers is available in Opalescent Gunmetal over light blue with a red interior. It comes equipped with an automatic transmission, dual carburetors, toggle switches, 4-wheel disc brakes, and wire wheels. An excellent original California car which had the same owner for many ...
- 9th Oct 2021
- United States of America
1968 F registration in silver with grey leather, rare manual overdrive, drives well and much history. A clean tidy car for someone who wants to drive the car, go to shows and use it, but not spend big big money on a concours example and never drive it. £11,995
- 19th Aug 2021
1969 Jaguar 420G Manual with O/D RHD UK reg. Finished in Tyrolean Dark Green with St James Red hide interior this ultra rare 420G with Manual gearbox with overdrive and PAS with a Radiomobile twin speaker system was delivered new to Brian Corser from Shrewsbury the noted Jaguar enthusiast and collector who had all of ...
- 9th Oct 2021
1969 Jaguar 420G Manual with O/D RHD UK reg Finished in Opalescent Silver Blue with Dark Blue Hide interior and carpets this ultra rare 420G with Manual gearbox with overdrive and PAS with a Radiomobile twin speaker system was delivered on the 28.9.69 to the first owner who kept the car until 1994 , the second owner ...
- 10th Oct 2021
1967 Jaguar 420, LHD US version with automatic transmission, power steering and A/C. This is a project car for partial or complete restoration. The body has damage to the left front. Apart from the damage, the body needs attention, but is generally solid. Older respray in factory original opalescent silver blue, ...
- 24th Aug 2021
Ask any Jaguar aficionado what happened in 1961 and you will undoubtedly be given the answer that this was the year that the Jaguar E-Type debuted to a blown away public. However, it was also the year that the Browns Lane company launched its biggest and most luxurious car to date: the MK X. This was a car of enormous ...
- 30th Aug 2021
imported this time warp just came out of in long term storage all original including paint, have all mots up to 1978 when it was exported to the USA excellent body engine turns freely, All paperwork and duties paid original buff log book and USA title. Manuals stamped up service book up to 40 thousand miles Interior ...
- 9th Oct 2021
A stunning looking used Jaguar 420 finished in gleaming Old English White with a lovely original Red leather interior. Fitted with Manual with Overdrive with Factory Power Steering. Wire wheels. Good patina. New sills just fitted. Fully serviced. Good chrome work. Original Handbook and Service booklet. Has been MOT 'd ...
- 27th Sep 2021
1967 JAGUAR 420 WITH MANUAL/OVERDRIVE GEARBOX,POWER STEERING ,LEATHER INTERIOR AND WIRE WHEELS ! ( UNUSUAL TO HAVE EVERYTHING ! ) NICE LOOKING CAR THAT STARTS,DRIVES AND STOPS, HAS A FEW PAINT ISSUES BUT STILL NICE ENOUGH TO USE AS IS. CHROMEWORK IS PRETTY GOOD. DELIVERY POSSIBLE FOR A FEE AS LONG AS THE VEHICLE IS ...
- 24th Sep 2021
This is a rare full spec Jaguar 420. It’s a manual of with wires and power steering. Can be driven anywhere with ease. It’s a fast comfortable car that is admired by many. It’s got new brakes electronic ignition electric fans and a manual choke all to make the car a daily driver. It also has a full stainless system. ...
- 13th Sep 2021
1968 Jaguar 420 in perfect running order. 3 previous owners from new, current and previous owner from same family, always loved and kept in top condition. New automatic gearbox and fully reconditioned engine (since driven under 5,000 miles) and electronic ignition. Will come with original ignition, steering wheel, radio ...
- 18th Sep 2021
This matching numbers 1967 Jaguar 420 Saloon is available in Willow Green with a Willow Green interior. The vehicle comes equipped with an automatic transmission, 4.2-liter engine, wire wheels, and white line tires. An original car that has just come out of storage and has a free turning motor. For $9,750 USD If ...
- 18th Sep 2021
- United States of America
This classic Jaguar 420 is a RHD South African assembly model. It has an automatic transmission and a rare and desirable sunroof. The Jaguar was imported and registered in the Netherlands in 2008 and driven regularly until the previous owner decided it was time for a cosmetic upgrade. Slow progress by the body shop ...
- 6th Oct 2021
Jaguar xj 4.200 coupé, 1977, automatic, low original mileage (60.000 miles - 96.000 km), original and rare "carriage brown" paint (available only in 1977), rare sand velvet&leather interiors, original jade trims, original philips radiocassette stereo, chromed wheels, rechromed bumpers, new tyres, original lucas foglights. ...
- 12th Oct 2021