The current Mercedes-AMG A45 is already the most powerful four-cylinder production car in the world, however the next-generation model will be even wilder, according to a new report.

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Believed to be scheduled for a 2019 release, the next-generation Mercedes-AMG hyper-hatch will again sit atop the new 2018 A-Class range, which is also reported to include a new plug-in hybrid (PHEV) variant.

In a new report by Autocar, sources have claimed the next-generation A45 will hit the 400hp (298kW) barrier from an updated version of the current 2.0-litre turbo, along with a new nine-speed dual-clutch transmission.

Today’s A45, is no slouch by any means, producing a whopping 280kW of power and 475Nm of torque from its 2.0-litre turbocharged petrol engine, sprinting from 0-100km/h in just 4.2 seconds.

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The next-generation model is expected to hit triple figures in less than four seconds, pushing the German hyper-hatch further into supercar territory.

The report adds that a second-tier A-Class AMG model is planned with the new range - think C43, GLC43 and E43.

Little details of the new car have been revealed, though the publication cites insiders claiming the new variant will closely compete with the Volkswagen GTI.

It’s likely this model will either be the successor to or replace the current A250 Sport 4Matic, which uses a 160kW/350Nm 2.0-litre turbo mated to a seven-speed DCT.

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Above: A prototype for the 2018 Mercedes-Benz A-Class

Prototypes for the next-gen A-Class have already been spotted testing, the most recent being spied heavily camouflaged earlier this week.

The new A-Class isn’t expected to make its global debut until late 2017 or early 2018, so any of these new models are at least a year away.