The 1973-1979 Jaguar XJ6/XJ12 Series II were improved follow-ups to the brilliant "Series I" XJ sedans, announced for Europe in October 1973 and for the U.S. in 1974.

The 1978 Jaguar XJ12, part of the 1973-1979 Jaguar XJ6/XJ12 Series II line.
1978 Jaguar XJ12.  See more pictures of Jaguar cars.

Initial changes involved stronger, higher-set bumpers (the front one prompting an abbreviated grille) and updated instrument panel with all gauges grouped in front of the driver and a large center vent for the improved air conditioning. Late '74 brought four additions to the line: six- and 12-cylinder XJC hardtop coupes and a similar pair of "L" (long) sedans with the wheelbase stretched four inches for additional rear leg room. The latter sold so well that they eventually supplanted the original standard-wheelbase sedans entirely.

Few other year-to-year changes save switching the automatic transmission from the outmoded Borg-Warner to a more modern GM Turbo Hydra-Matic during 1976. Both V-12 and XK six retained dual carburetors (fuel injection for American cars in 1978-79) and power ratings close to Series I levels, even on emissions-tuned American models.

The XJ6 2.8 remained a tax-beating "economy special" mainly for Europe. Equivalent Daimler Sovereign and Double Six continued (respective total production: 20,075 and 4292), but again not for the U.S.

Pluses of the 1973-1979 Jaguar XJ6/XJ12 Series II:

  • Grace, pace
  • Luxurious wood-and-leather cabin
  • Silken engines
  • Good performance (0-60: 10.5 seconds, XJ6; 8.5, XJ12)
  • Super sedan handling
  • Full power assists
  • XJ12's rarity
  • All versions still relatively inexpensive
  • Tidier dash than the 1969-73 Series I
  • Even lower asking prices today

Minuses of the 1973-1979 Jaguar XJ6/XJ12 Series II:

  • Not much space
  • Jaguar's usual reliability and rust worries
  • "Vintage" ergonomics
  • Avoid ratty specimens -- there are lots of them
  • Front end slightly "chubbier" than the 1969-73 Series I
  • Workmanship even spottier than the 1969-73 Series I

Production of the 1973-1979 Jaguar XJ6/XJ12 Series II:

  • 1973: 1,656
  • 1974: 18,270
  • 1975: 14,229
  • 1976: 15,440
  • 1977: 10,956
  • 1978: 15,422
  • 1979: 1,528

Production of the 1973-1979 Jaguar XJ12 Series II:

  • 1973: 168
  • 1974: 4,744
  • 1975: 2,239
  • 1976: 3,283
  • 1977: 1,913
  • 1978: 3,284
  • 1979: 429

Specifications of the 1973-1979 Jaguar XJ6/XJ12 Series II:
Length, inches: 194.8 (L: 198.8)
Wheelbase, inches: 108.8 (L:112.8)
Weight, pounds: 3,950-4,300
Price, new: $10,300-20,000 (in U.S.)

Engines for the 1973-1979 Jaguar XJ6/XJ12 Series II:

TypeSize
HorsepowerYears
dohc I-6
2,792 (171 cid) 140
1973-1975
dohc I-63,442 (210 cid)
1611975-1979
dohc I-64,235 (258 cid)
245/162-1861973-1979
ohc V-125,343 (326 cid)
265/244 1973-1979

Want more information about classic cars? See: