Jaguar has facelifted the XF and introduced a new diesel-engined model – the Jaguar XF S – which enables the saloon to deliver 42mpg.
The Jaguar XF’s new engine is a development of the 2.7-litre AJ V6 that was jointly engineered with PSA and also powers the Land Rover Discovery.
Capacity has increased to 3.0 litres, and power is up by 33 per cent, from 207bhp to 272bhp. Torque increases to 420lb ft from 320lb ft, a 66 per cent hike. That makes the new unit more torquey than any of its rivals apart from the BMW 535d.
The new engine means that the Jaguar XF S, as the new diesel model will be called when it arrives in dealerships in March, can hit 60mph in 5.9sec, 1.8sec faster than the old 2.7-litre diesel. The car’s CO2 emissions fall from 199g/km to 179g/km.
Jaguar’s engineers have upgraded the engine’s forced induction system. Up to 2800rpm the larger of the two turbos does all the work, at which point the smaller unit kicks in. Jaguar claims that this system improves efficiency and reduces fuel consumption.