Jaguar XJ vs Mercedes-AMG E63

What's the difference?

As a child, my parents - who aren't car people - would see a Jaguar and point. It didn't matter if it was an XJ, Daimler Double Six or a Mark II, there was a great deal of mystique around these bastions of Britishness. It also didn't matter that these weren't necessarily good cars. The Seventies and Eighties saw the brand slide into a funk while being passed between owners like hot potatoes.

Somehow, the brand survived its brush with Ford's useless Premier Automotive Group strategy which only came good towards the end as Jaguar's management woke up and put in place a change in direction that produced the Ian Callum-designed XF. Riding high on that design, Jaguar then promptly introduced the very pretty Jaguar XJ.

It has been on sale for ages, but with the addition of a few bits and bobs to stay competitive, it's as compelling as ever. Most importantly, the performance-focused R has kept its unique supercharged V8.

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.