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Jaguar pounces with twin-turbo V6

2008-12-30 09:13
Jaguar dumps its 2.7 diesel V6 for a shiny new and dramatically more powerful, 3.0-litre twin-turbo V6.

The new engine is considered by Jaguar to be its most advanced and efficient diesel yet with a key feature being its use of a parallel sequential turbocharger system. This is said to be its first application in a V-engine yet.

While a larger, variable geometry turbocharger provides the main source of boost, a smaller, fixed-geometry turbo remains dormant until the engine revs above 2 800 r/min. While dormant, the smaller turbo saves energy while improving efficiency and, when it is called into action, is said to deliver boost without a noticeable power-step.

A new common rail fuel injection system delivers up to five injections on each cycle at a pressure of 2 000 bar.

The engine is mated to a six-speed automatic transmission in both its 202-kW and 177-kW guises. 

More power, more torque

In its 202-kW form with 600 Nm of torque, the twin-turbo V6 is quoted as being 33% more powerful with 61% more torque over the outgoing 2.7-litre V6.

This allows the big cat to accelerate from 0 - 100 km/h in 5.9 seconds. Top speed is electronically limited to 250 km/h.

The engine is also available as a 177-kW version, which in this guise delivers 16% more power and 15% more torque than the 2.7-litre.

With this unit, XF is able to sprint from standstill to 100 km/h in 6.7 seconds while its maximum speed is 240 km/h.

Combined fuel consumption for both models is a claimed 5.6 l/100 km.

CO2 emissions are down, too, by 10% to 179 g/km and the engine complies with EU5 emissions standards that are due to be implemented in 2011.


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