Overview
Produced: 1966-1970, 5763 produced.
Types: Saloon,4 doors,4 seats
Limousine

In 1966 the Jaguar Mk X became the 420G as part of the revised range of Jaguar saloons. Essentially the 420G was a renamed Mk X 4.2 and could only be distinguished by an additional waist  moulding and new badges.

As with the Mk X the 420G offered an immense bodyshell and was often used for chauffeur driven work, a divided limousine body was available although only a handful were built. After the models demise in 1970 the 420G platform continued to be used as the basis for the Daimler Limousine series, which continued in production until 1992.

Further information submitted:

8:1 compression ratio gave a (claimed) 250 BHP. 9:1 gave (claimed) 265BHP. The difference was brought about by domed pistons for the 9:1 version, similar to the E-Type.

Source: Motorbase
Engines
CapacityConfigModelBore/StrokeCR
4235ccS6 DOHCJaguar XK92.07mm x 106mm8
Fuel System
TypeNumberCapacityComment
SU 2inch3
Performance
Top Speed0-60SQMMPGEngine PwrComment
122 mph10.4 s265 bhp 5400
Brakes
FrontRearComment
DiscDisc
Auction Sales History
Lot
Num
Description Auctioneer Date Hammer Price Hammer Price
(inc premium)
010 Jaguar 420G H&H Sales Limited 31 Oct 2012 Not sold
117 Jaguar 420G Barons 19 Apr 2011 £7250.00 -
137 Jaguar 420G Barons 19 Apr 2011 Not sold
16 Jaguar 420G H&H Sales Limited 26 Feb 2011 - £4400.00
012 Jaguar 420G Brightwells Auctioneers and Valuers 22 Sep 2010 £1800.00 -
329 Jaguar 420G Coys 17 Jul 2010 - £72165.00
305 Jaguar 420G Saloon Bonhams 20 Apr 2009 £1900.00 £2185.00
105 Jaguar 420G Barons 24 Mar 2009 £2500.00 -
014 1968 JAGUAR 420G H&H Sales Limited 1 Mar 2007 Not sold
Unknown Jaguar 420G Barons 25 Apr 2006 Not sold
18 Jaguar 420G BCA 20 Feb 2006 - £4138.00
624 1967 JAGUAR 420G FOUR-DOOR SALOON Christies 1 Jul 2005 £1175.00 -
343A 1969 Jagaur 420G Saloon Coys 18 Jun 2005 - £9085.00
207 Jaguar 420G Barons 7 Jun 2005 Not sold
202 Jaguar 420G Barons 7 Jun 2005 Not sold
107 Jaguar 420G Barons 22 Mar 2005 Not sold
108 Jaguar 420G Barons 8 Feb 2005 £1700.00 -
124 Jaguar 420G Barons 8 Feb 2005 Not sold
628 Jaguar 420G Saloon Bonhams 6 Dec 2004 £1800.00 £2070.00
636 Jaguar 420G Saloon Bonhams 23 Nov 2004 £2300.00 £2645.00
1163 Jaguar 420G Coys 3 Jul 2004 £8662.00 -
960 Jaguar 420 G Cheffins 12 Jun 2004 Not sold
074 Jaguar 420G H&H Sales Limited 8 Jun 2004 £7500.00 -
009 1970 Jaguar 420G BCA 14 Feb 2004 Not sold
1051 Jaguar 420G Saloon (1969) Coys 21 Jun 2003 - £5528.00
545 Jaguar 420G (1967) Lambert & Foster 15 May 2003 Not sold
093 Jaguar 420G (1970) H&H Sales Limited 7 May 2003 Not sold
004 Jaguar 420G Saloon (1967) H&H Sales Limited 7 May 2003 Not sold
015 Jaguar 420G (1967) H&H Sales Limited 9 Apr 2003 Not sold
166 Jaguar 420G (1969) Barons 15 Dec 2002 £8000.00 -
233 Jaguar 420G (1970) Barons 20 Oct 2002 Not sold
051 Jaguar 420G Saloon (1968) H&H Sales Limited 2 Oct 2002 Not sold
078 Jaguar 420G Saloon (1968) H&H Sales Limited 2 Oct 2002 - £10500.00
072 Jaguar 420G Limousisne (1969) H&H Sales Limited 24 Jul 2002 - £4830.00
218A Jaguar 420G (1970) Coys 22 Jul 2002 Not sold
204 Jaguar 420G (1969) Coys 22 Jul 2002 Not sold
464 Jaguar 420G Saloon (1969) Bonhams 13 Jun 2002 Not sold
097 Jaguar 420G Saloon (1969) Christies 11 Jun 2002 - £3462.00
035 Jaguar 420G (1969) Coys 30 Apr 2002 Not sold
024 Jaguar 420G (1969) BCA 8 Apr 2002 Not sold
045 Jaguar 420 Saloon (1969) Barons 26 Jun 2001 Not sold
326 Jaguar 420G (1967) Lambert & Foster 14 Jun 2001 Not sold
C11 Jaguar 420G Saloon (1968) H&H Sales Limited 17 Mar 2001 £4000.00 -
001 Jaguar 420G Saloon (1967) Barons 5 Sep 2000 Not sold
002 Jaguar 420G (1970) BCA 7 Aug 2000 - £2728.00
006 Jaguar 420G (1970) BCA 6 Dec 1999 Not sold
051 Jaguar 420G (1970) BCA 11 Oct 1999 Not sold
002 Jaguar 420G (1967) Barons 11 May 1999 £800.00 -
371 Jaguar 420G Saloon (1970) Brooks 23 Feb 1999 - £518.00
Unknown Jaguar 420 Sovereign (1969) Barons 29 Sep 1998 Not sold
033 Jaguar 420G Saloon (1969) H&H Sales Limited 23 Sep 1998 Not sold
069 Jaguar 420G Saloon (1968) H&H Sales Limited 23 Sep 1998 £14500.00 -
011 Jaguar 420G Berline (1970) Poulain LeFur 30 Mar 1998 - FF49884.00
248 Jaguar 420G Saloon (1969) RTS Auctions Ltd 11 Jan 1998 £2800.00 -
239 Jaguar 420G Saloon (1968) RTS Auctions Ltd 11 Jan 1998 £1600.00 -
245 Jaguar 420G (1969) RTS Auctions Ltd 17 Aug 1997 £3850.00 -
240 Jaguar 420G (1967) RTS Auctions Ltd 17 Aug 1997 £5000.00 -
504 Jaguar 420G Saloon (1968) Sothebys 7 Jul 1997 £3900.00 -
213 Jaguar 420G (1969) RTS Auctions Ltd 29 Jun 1997 £1750.00 -
062 Jaguar 420G Saloon (1969) H&H Sales Limited 4 Jun 1997 Not sold
366A Jaguar 420G Saloon (1967) Brooks 8 May 1997 £3700.00 -
231 Jaguar 420G (1968) RTS Auctions Ltd 13 Apr 1997 £1850.00 -
082 Jaguar 420G (1970) BCA 7 Apr 1997 Not sold
024 Jaguar 420G (1967) BCA 7 Apr 1997 Not sold
053 Jaguar 420G (1967) BCA 10 Feb 1997 Not sold
070 Jaguar 420G (1969) ADT 16 Dec 1996 Not sold
927 Jaguar 420G Saloon (1967) Brooks 2 Dec 1996 - £9200.00
888 Jaguar 420G Saloon (1969) Brooks 2 Dec 1996 - £3220.00
062 Jaguar 420G (1968) H&H Sales Limited 27 Nov 1996 Not sold
248 Jaguar 420G (1969) RTS Auctions Ltd 24 Nov 1996 £3000.00 -
057 Jaguar 420G (1970) H&H Sales Limited 23 Nov 1995 £2500.00 -
096 Jaguar 420G (1970) ADT 2 Oct 1995 Not sold
015 Jaguar 420G (1969) ADT 12 Jun 1995 Not sold
203 Jaguar 420G Saloon (1967) Brooks 19 Mar 1995 Not sold
243 Jaguar 420G Saloon (1967) Brooks 19 Mar 1995 £5100.00 -
448 Jaguar 420G Saloon (1967) Sothebys 6 Mar 1995 £3800.00 -
081 Jaguar 420G Saloon (1969) Sandown 25 Feb 1995 £2700.00 -
267 Jaguar 420G Saloon (1968) Brooks 21 Feb 1995 Not sold
290 Jaguar 420G Saloon (1969) Brooks 21 Feb 1995 £5350.00 -
358A Jaguar 420G (1968) Sothebys 5 Sep 1994 £5500.00 -
025A Jaguar 420G (1967) Sandown 3 Sep 1994 £3600.00 -
076 Jaguar 420G (1969) ADT 13 Jun 1994 £2100.00 -
001 Jaguar 420G (1968) ADT 13 Jun 1994 Not sold
206 Jaguar 420G (1968) Christies 14 May 1994 £3800.00 -
009 Jaguar 420G (1968) ADT 6 Dec 1993 £750.00 -
018 Jaguar 420G (1968) Sandown 30 Oct 1993 £4000.00 -
340 Jaguar 420G (1970) Sothebys 4 Sep 1993 Not sold
004 Jaguar 420G (1967) ADT 9 Aug 1993 Not sold
053 Jaguar 420G (1968) ADT 9 Aug 1993 Not sold
009 Jaguar 420G (1968) ADT 21 Jun 1993 £3100.00 -
058 Jaguar 420G (1970) ADT 21 Jun 1993 Not sold
016 Jaguar 420G (1969) ADT 19 Apr 1993 Not sold
095 Jaguar 420G (1967) Christies 29 Mar 1993 £9000.00 -
Books
Magazine Articles
Title Pages Options
Article Ghost of the past - 1961-70 Jaguar MKX/420G
92 View
Publication Classic Cars July 2009
Ghost of the past - 1961-70 Jaguar MKX/420G Despite physically overshadowing the compact jaguars of the Sixties, the MkX has faded into near obscurity.  Discover why it's worth seeking one out.
Article Supersize Meow!
40 View
Publication Classics Monthly April 2007
Supersize Meow! - Can a large luxury saloon be a versatile classic? We try two of the largest ever to grace British raods, the Jaguar 420G and Daimler Sovereign.
Article Forgotten Feline
46 View
Publication Jaguar Enthusiast January 2007
Forgotten Feline - Nigel Thorley takes a look back at the Jaguar Mark X and 420G models after being prompted by member R. Pritchard.
Article Buying Power - Jaguar S-Type/420
24 View
Publication Classic Car Weekly 30th June 2004
Buying Power - Jaguar S-Type/420 - The Mk2, the E-Type, the XJ6....Oh yes, wasn’t there something called the S-Type too?  RiCHARD GUNN looks at buying the Jaguar even enthusiasts forget about.
Article Buying Power - Jaguar MK X/420G
24 View
Publication Classic Car Weekly 7th April 2004
Buying Power - Jaguar MK X/420G - Few mainstream Sixties classics are as utterly imposing on the road as Jaguar's Mk X/420G.  Richard Gunn looks at how to buy Coventry's country house on wheels.
Article Club Refurbishment Projects - Part Thirty One
62 View
Publication Jaguar Enthusiast March 2004
Club Refurbishment Projects - Part Thirty One - This month Dave Marks Garage continues the work of rebuilding the rear independent suspension of the 420 saloon.  Except where indicated, the same work applies to the Daimler Double Six Vanden Plas Series 2 we are working on for the Jaguar Daimler Heritage Trust.
Article 420 Project - Part Thirty
62 View
Publication Jaguar Enthusiast February 2004
420 Project - Part Thirty - Last month, Dave and Bob completed the work on the front axle, now attention is turned to the rear independent suspension subframe of the 420.  The work covered is also applicable to the many other Jaguar models, from the 1960s S-type, through Mark X/420G, E-type series XJs and most XJ-Ss.
Article 420 Project - Part Twenty Nine
48 View
Publication Jaguar Enthusiast January 2004
420 Project - Part Twenty Nine - Continuing on from last month, Dave and Bob are working on the rebuild of the front axle assembly.  Front axel rebuild- 2.
Article 420 Project Part Twenty Eight - Front Axle Rebuild
60 View
Publication Jaguar Enthusiast December 2003
420 Project Part Twenty Eight - We move again from the Manchester College body shop to Dave Marks's garage in Nottingham as the work on the front and rear axles commences.
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