BMW M3 vs Mercedes-AMG E63

What's the difference?

There’s no point waxing too lyrical here, because the facts surrounding the M3 Touring are more than exciting enough.

It’s a (kind of) family friendly wagon with oodles of space and practicality. It’s also an unhinged performance weapon with a thumping 3.0-litre twin-turbo-petrol inline six-cylinder engine.

And it has been years — decades, even — in the making. So, has it been worth the wait? Let’s strap in and find out.

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.