Background
Here’s a good pub quiz question: what was the largest British saloon of the last century? Finding a definitive answer is tricky, but we’d be very surprised if anything can beat the vast and immensely stylish land yacht that is the magnificent Jaguar 420 G.
Unveiled at the London Motor Show in October of 1966, the Jaguar 420G was really a continuation of the Mk X, which was sold between 1961 and 1966.
Not to be confused with the smaller Jaguar 420 saloon based on the S-Type, the G featured numerous small aesthetic changes compared with the Mk X, including a redesigned front grille with a vertical bar, side indicators on the front wings, and a chrome strip along the side, though this was often omitted from two-tone paint cars in order to clean-up the appearance.
Mechanically, the 420G – the G stands for Grand – was virtually identical to the Mk X, retaining the iconic XK DOHC inline-six engine which, from 1966, had expanded in capacity to 4.2 litres.
One perhaps unsurprising fact about the enormous Mark X/420G is that it was certainly the largest car Jaguar built in the 20th century, with only the X350 XJ of 2003-2009 coming remotely close to its proportions.
The 420 G was of course replaced in Jaguar’s line up by the all-conquering XJ6, but it remains a fascinating, enigmatic and slightly left field classic saloon, that combines American car proportions with traditional British craftmanship and style.








