Here’s the official shots of the XF Diesel S, in its higher tune, boasts 443lb ft of torque and a 5.9sec dash to 60mph, while top speed is reined-in at 155mph. Average fuel consumption is 42mpg while CO2 emissions are 179g/km. In-gear acceleration isn’t bad either, 50-70mph taking just 3.2sec. Compared to the 2.7-litre diesel XF, power is up by a third with emissions and consumption down by around a tenth. Torque at 1500rpm is up by a massive 61 per cent, so anyone upgrading will really reap the benefits of the new engine.The new unit is pretty trick, with two turbos, one bigger than the other. The bigger, variable-geometry turbo does all of the work the majority of the time, being the sole provider of extra shove during a motorway cruise. A smaller, secondary turbo (which is fixed-geometry) lies dormant until you pass 2800rpm, when it starts working to provide a seamless flow of extra power.
Prices themselves are yet to be revealed, but they will be higher than the current 2.7-litre diesel but are likely to undercut the $52k and $60k commanded by the BMW 5-series diesels in M Sport trim. You’ll be able to tell the new XF Diesel S from existing variants via 20in alloy wheels, a discreet boot lid spoiler and some subtle S badging, although the car will also gain a more striking Portfolio version in the near future.
[via Flylyf]
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