Jaguar XF vs Mercedes-AMG E63

What's the difference?

If a Jaguar owner fell through a wormhole from 2003, the company they bought their car from would be   almost unrecognisable. Back then, it was a bewildering mess making an odd assortment of cars, yet to emerge into the light after Ford's confused and debilitating period of ownership. 

Why 2003? Fifteen years is a nice round number and pre-dates the arrival of the brand-saving XF.

Today, Jaguar has three SUVs, and the gorgeous F-Type, the XE, its second-generation XF and the big XJ. It has three SUVs (the F-Pace, E-Pace and I-Pace) because without them Jaguar would be a niche manufacturer before long, because big sedans, formerly the brand's trademark, are continuing their gentle decline. Oddly enough, one of the market segments contracting even faster than sedans is wagons. 

So what better time to launch into a draining pool from the three-metre board than now? Jaguar has bravely taken that risk and brought us the puzzlingly named XF Sportbrake.

Feels like lately all the Mercedes-AMG buzz has been at the smaller end of the scale.

Most recently, the screaming GLA 45 S has arrived in Australia, pumping out more kilowatts and newton-metres than any compact SUV has a right to.

But here, we're doubling the cylinder count to eight, arranging them in a vee, and lighting the wick on AMG's powerhouse mid-size sedan, the recently upgraded E 63 S.

While the ferocious twin-turbo V8 and the rest of this beast's powertrain are unchanged, the car has been brought up to speed with some aero-focused styling tweaks, Merc's latest 'Widescreen' digital cockpit, as well as the MBUX multimedia system, and a tricky new multi-function sports steering wheel.