The tailgate features a soft-close electric hinge and can be electrically powered as an option. A pair of rails on the boot floor can accommodate a raft of nets and dividers to hold cargo still.
Sportbrake lead designer Wayne Burgess told Britain's AutoExpress: "We tried to make the load space as luxurious as the rest of the car. That's why you'll find deep carpeting, ambient lighting and a stainless-steel plate on the lip. Your dog will love it in there!"
The wheelbase remains the same as the XJ saloon's, but the roof has been significantly lengthened, giving an extra 48mm of rear headroom.
Blacked-out B- and C-pillars create a far longer, slimmer side glass area than on the four-door, while the D-pillars also get a gloss black finish (a cue borrowed from the XJ), creating the illusion that the tinted rear screen wraps right around the back of the car.
As Europe is the target market, Jaguar will only offer diesel power.
The range-topping S, producing 202kW and 600Nm from its 3-litre V6 turbodiesel, should cover 0-100km/h in less than six seconds and return around 6.2 litres/100km, or 45mpg.
A 176kW V6 diesel will also be available in some markets.
For maximum economy, though, the four-cylinder 2.2-litre is the one to go for. This features stop-start as standard, and is set to return around 4.5 litres/100km, or 52mpg.
All models are equipped with an eight-speed automatic transmission and self-levelling air-suspension at the rear.
Jaguar predicts Sportbrakes will account for around 20 per cent of total XF sales. Next for the company is the C-X16 sports car, as well as four-wheel-drive and hybrid models.