Labelled under the codename M139, Carscoops has claimed that the new A45 AMG will get a base output of 382bhp and 480Nm of torque from its new turbocharged 2.0-litre four-cylinder engine. An S variant will have even more power with 415bhp and 500Nm of torque.
A quick calculation reveals a staggering 208bhp per litre which is a figure that definitely right up there when it comes to mass production cars. Beside that, the engine revs to 7200 rpm and is said to have a torque curve that will deliver power in a fashion similar to a naturally-aspirated engine.
Some interesting facts about the engine include having a new twin-scroll turbocharger that features a turbine housing with two different flow passages that run parallel to one another. It also receives roller bearings which helps to reduce friction and improve responsiveness.
Elsewhere, the engine is made of aluminium and gets a forged steel crankshaft and forged aluminum pistons which reside in Nanoslide-coated cylinder liners.
Mercedes-AMG has also uprated its cooling capabilities and equipped it with an electric water pump that operates independently of the engine. The car will also come with an additional radiator that supports the main radiator in front.