Why is the Jaguar XF a lower-drag vehicle than the S-Type it replaced? What was the aerodynamics development process followed?
Published as:
Gaylard AP (2008) The Aerodynamic Development of the New Jaguar XF. In, 7th MIRA International Conference On Vehicle Aerodynamics. 22nd -23rd October 2008, Coventry, UK. ISBN 978 1 906400 05 7
I would like to point out that this presentation is reporting the work of a number of colleagues, past and present, particularly: Paul Beckett, Ian Anderton, Joe Edge, Andy Sheppard and Jeff Howell.
The S-Type is a full-sized saloon with ‘notchback ’ style, rounded rear geometry. Relatively steep backlight and sloping boot deck
The cognizance taken, by the designers, of ‘best practise’ aerodynamic guidelines along with the desire for more contemporary styling cues, had mitigated the ‘worst case’ starting point for CD of 0.34 to just under 0.33. However, this design still reflects the S-Type’s ‘ notchback ’ rear style.
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The XF aims to fuse the style and performance of a sports car with the space and refinement of a luxury saloon. The sports car heritage is seen in the generally aggressive stance; epitomised by large 'haunches' over the rear wheels along with an upright and aggressive front grille. This styling poses significant aerodynamic challenges.