Jaguar XF review - is the Jaguar's exec-saloon best in class? - MPG and Running Costs
An engaging drive, but rivals beat Jaguar in some areas
MPG and running costs
WLTP regulations have seen the XF's engine lineup change over the past year or so and quoted economy figures have also taken a tumble – though it's important to realise that any such changes will also be suffered by competitors, so it's difficult to compare like-for-like until all manufacturers display WLTP numbers as a matter of course.
To illustrate the disparity, just take a look at how the numbers have changed for the entry-level diesel: What was previously capable (on paper) of 70.6mpg with a manual gearbox has now dropped to 55.4mpg. Almost certainly more realistic, but not quite as sparkling in the brochure. Likewise, CO2 has risen from a probably unlikely 104g/km to 129g/km.
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With the automatic gearbox you don't lose a great deal, at 54.3mpg and 138g/km, while moving up to the 178bhp diesel with the auto 'box and all-wheel drive drops economy to 50.4mpg and raises CO2 to 148g/km.
The petrols aren't too bad on fuel – the 247bhp four-pot manages 44.1mpg – but for a mix of performance and economy the V6 diesel holds the trump cards, with 45.6mpg combined even after WLTP shenanigans and CO2 of 163g/km.