No surprise there, you might say, because everyone knows that most cars fail to live up to the advertised figures in the long run.
I’ve been thinking, though: by how much does the XE miss its claimed figures by in the real world? To find out, I lent our car to sister magazine What Car?’s in-house team of True MPG testers, who assess the economy of cars over a variety of real-world conditions.
Jaguar says our test car — a 2.0-litre Ingenium diesel with 178bhp — should return 55.4mpg in the city and more than 76mpg on the motorway. However, our tests returned 38.4mpg and 51.6mpg respectively. That’s an average of 33% behind what Jaguar suggests.
The bottom line is that our XE will return a real-world average of 45.0mpg. That number tallies (just) with what we’ve been able to achieve. Now, enter the BMW 320d, which on the same tests returned an average of 51.7mpg — an 18% dip on what BMW claims. The Mercedes-Benz C-Class C220 d returned 51.0mpg, 26% behind its claimed figures. The Jaguar still beats the new Audi A4 2.0 TDI, which returned 44.4mpg in the True MPG tests, 32% behind what Audi claims.