A few words in the Mercedes-Benz literature that accompanies the Mercedes-AMG A 45 tell you much about the thinking behind this car: the target audience is drivers aged between 30 and mid-40s. A great deal younger than your typical AMG buyer, or any other super-saloon buyer, in other words.

The A 45 – the most powerful hot hatchback on sale, and with currently the most powerful four-cylinder engine in production – is meant to open up AMG to a host of potential fans who have hitherto been denied access to the high-priced, usually V8-powered cars from Mercedes’ sporting arm. It’ll also add extra gravitas to styling kits and trim levels featuring AMG badging.

It's unusual for a firm with Mercedes-Benz's historical heft not to be able to point to a forebear, but the 40-year-old hot hatch concept is a novel one for the three-pointed star.

The previous A-Class, in seldom-seen A 200 Turbo format, was blessed with a butch-sounding 193bhp from its 2.0-litre petrol engine, yet the elk-tester found it was patently unsuited to the business of boisterous driving. Consequently the smallest model that AMG previously fiddled with was probably the Mercedes-Benz SLK.

So not only is the A 45 a different kind of AMG product, but it’s also a different kind of hot hatch. It's got part-time four-wheel drive system. It's also expensive. And with 355bhp, it’s a powerful hot hatch. However, in 2015 Audi decided to snatch that crown with its RS3, before the AMG division upped the ante by turing up the wick and giving the A 45 an unprecedented 376bhp.

During the course of this review, we’ll find out if it’s also a compelling hot hatch. It will have to be if it is to justify its five-figure premium over the mega Ford Focus RS, and £7000 more than the Volkswagen Golf R, our two current favourite hot hatches.

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