The current Jaguar XJ is powered by a 5.0 liter V8 engine offered in both naturally aspirated and supercharged versions with outputs ranging from 385 hp to 510 hp. Europeans also get a 3.0-liter V6 diesel engine. Now, rumors suggest that Jaguar is also preparing a 4.4 liter TDV8 engine for 2011 in a model called either the Jaguar XJ TDV8 or the Jaguar XJ Supersport TDV8.
The 4.4 liter diesel engine will deliver a total of 375bhp and a peak torque of more than 600lb.-ft. The sprint from 0 to 60 mph will be made quicker than the supercharged XJ and will return 40mpg. Same engine is also rumored to be offered in the Jaguar XF.