Jaguar pulled the covers off its all-new XF - 18 metres above the Thames. The world’s longest hire-wire water crossing showcased the XF’s lightweight credentials – its new aluminium body is 190kgs lighter than its predecessor. Less weight means better efficiency, says Jaguar, with the new car offering over 70mpg. Power comes from a choice of engines ranging from a 2.0-litre diesel to a 380PS, 3.0-litre V6 supercharged petrol engine. Further details for the all-new Jaguar XF will be revealed at the New York Auto Show in April.