So far, there are only two large candidates at taking a place under the XJ's hood: a 3.0l turbodiesel and possibly a new 5.0l V8. Still, the engine line-up might be larger than that, as the current generation for instance makes use of four different types of engines (one diesel and three gasoline).
But now it would seem that Jaguar won't stop here. According to autocar.co.uk, the manufacturer also has plans for fitting a hybrid version of the XJ. The aforementioned source goes even further and speculates that the targets set by Jaguar for its luxury sedan are an electric range of 30 miles (48 km), a fuel consumption rating of 57 miles per gallon (5l/100 km) and CO2 emissions rated at 120g/km. The hybrid XJ is said to have a top speed of 112 mile per hour (180 km/hour).
Whether a hybrid XJ is a fact or purely speculation remains to be seen. So far, Jaguar Land Rover has no hybrid in its line-up, but it won't be a surprise if it plans on developing one. After all, if Mercedes can do it for its S400, why wouldn't Jaguar? The answer to this question will remain unanswered for at least two years, as the next generation XJ is only set to make its debut in 2011.