<p>The Series I XJ6 was introduced in 1968, replacing most of the old Jaguar saloons. The very similar but more upmarket Daimler Sovereign was sold along side it. The XJ12 version (and Daimler Double Six) was announced in July 1972, featuring simplified grille treatment, and powered by a 5.3 L V12 engine. 
In 1973 the facelift Series II was introduced,  Visually, Series II cars are differentiated from their predecessors by raised front bumpers to meet US crash safety regulations, which necessitated a smaller grille, complemented by a discrete additional inlet directly below the bumper. A 2 door Coupe version was now available. 
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Engine; 2.4, 3.8, 4.2 6s or 5.3 V12
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<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/42220226@N07/16673830442/">1970 Jaguar XJ6 Series I Saloon</a>