The Jaguar XF sedan with its four-cylinder diesel engine makes a departure for the company. Drive It! puts the XF to the test.Jaguar's engineers have put themselves to the task of combining the legendary marque's sporting luxury with high fuel economy. The XF Diesel wrings 147 kilowatts and 450 Newton-meters of torque from a 2.2 liter displacement - good for a top speed of 225 km/h and an enjoyable driving experience. And fuel consumption of just 5.1 liters for 100 kilometers should bring a smile to owners' faces.