Mercedes-Benz A25 AMG will be more powerful than the Audi RS3 Sportback

Article by Christian Andrei, on February 12, 2012

Mercedes-Benz’ AMG division has requested the assistance of its High Performance Engine (HPE) offshoot in Brixworth, Northamptonshire, to develop the upcoming A25 AMG’s turbocharged 2.0-litre, four-cylinder engine. It is scheduled to have its world debut this September at the Paris Motor Show.

The four-wheel-drive A25 mega-hatch is about to get a heavily reworked version of Mercedes’ current M271/M274 petrol engine. The unit comes with the same 7mm wall thickness and 90mm bore centre space as what Mercedes-Benz HPE had imagined for its discontinued turbocharged 1.6-litre Formula 1 engine.

This powerplant being developed before the world motorsport governing body, the FIA, ratified conflicting turbocharged 2.4-litre V6 engine rules for the 2013 F1 season. AMG decided to involve HPE in the development of the A25’s engine after the tough engineering targets laid down by its boss, Ola Kallenius, formerly the head of HPE.

He claims that the turbocharged 2.0-litre unit offers more power than the 335bhp turbocharged 2.5-litre, five-pot engine in the Audi RS3 Sportback and the 316bhp turbocharged 3.0-litre straight six seen on BMW’s forthcoming M135i hatch. The new BMW hot hatch is set to appear this March at the Geneva motor show. Additional details have yet to be released but Autocar sources hint that the engine will get a bore and stroke of around 83mm x 89mm, implying a capacity of 2.0-litres.

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