Mercedes-Benz has revealed details about its A 45 AMG hot hatch.
Its AMG 2.0-litre turbo engine is the most powerful series production four-cylinder turbo engine in the world, according to Mercedes. The powerplant's maximum output is a stonking 264kW and 450Nm.
"The A 45 AMG will enable Mercedes-AMG to appeal to new customers and tap new markets," observes Ola Källenius, Chairman of Mercedes-AMG GmbH. "We are adding an extremely attractive model with exceptional performance to our range of unique high-performance automobiles."
The high power and torque output and the combination with the performance-oriented AMG 4MATIC all-wheel drive lead to extremely dynamic performance: the A 45 AMG accelerates from zero to 100km/h in just 4.6 seconds, while its top speed stands at 250km/h (electronically limited).
"With the new A 45 AMG we have well and truly achieved our aim of developing the most dynamic, powerful and efficient four-cylinder series production car," comments Tobias Moers, Head of Overall Vehicle Development and Board Member of Mercedes-AMG GmbH. "With its impressive high-tech package and the performance-oriented AMG 4MATIC all-wheel drive, the A 45 AMG is a thoroughbred AMG through and through."
The basis for these impressive figures is provided by the high-tech package which has been put together by Mercedes-AMG. As a high-performance engine belonging to the BlueDIRECT family, the AMG 2.0-litre four-cylinder turbo engine features spray-guided direct petrol injection via piezo injectors positioned centrally in the four combustion chambers. The combination of multiple fuel injection and multiple spark ignition improves fuel utilisation and increases thermodynamic efficiency substantially, leading to lower exhaust emissions.Other highlights include the gravity-die sandcast all-aluminium crankcase, weight-optimised crank assembly with forged steel crankshaft and forged pistons with friction-optimised piston rings, Nanoslide cylinder wall technology, air-water charge air cooling, generator management and ECO start/stop function.
Mercedes-AMG addresses the essential challenges concerning the response of small-displacement turbo engines by means of a twin-scroll turbocharger, maximum derestriction of the exhaust system and an innovative injection strategy. The twin-scroll technology provides for a more spontaneous build-up of charge pressure, making effective use of exhaust gas back pressure, exhaust gas temperature and exhaust gas impulse. This results in a swifter build-up of torque right from the lower rev range.As a positive side-effect, the twin-scroll technology also benefits fuel consumption and exhaust emissions. At a maximum charge pressure of 1.8 bar, the AMG 2.0-litre four-cylinder turbo engine also leads the field in this respect.
The AMG sports exhaust system features large pipe cross-sections and an automatically controlled exhaust flap.This technology, which is familiar from the SLK 55 AMG, reconciles the two apparently conflicting aims of tangible dynamism and hallmark Mercedes comfort on long journeys. The flap is continuously adjusted by map control according to the power called up by the driver, load status and engine speed. The two striking tailpipes of the AMG sports exhaust system emit a fascinating, full engine sound which is particularly impressive during powerful acceleration.
Similarly to all eight- and twelve-cylinder engines, the new AMG 2.0-litre four-cylinder turbo engine is also hand-built according to the traditional AMG philosophy of "one man, one engine". An exclusive assembly line has been set up for the new AMG engine at the Mercedes-Benz engine production plant in Kölleda - where all BlueDIRECT four-cylinder engines are built for the A- and B-Class models. A characteristic feature of the production process is the AMG engine plate bearing the signature of the responsible engine fitter.
The AMG Speeshift DCT seven-speed sports transmission is directly flange-mounted on the transversely installed AMG 2.0-litre four-cylinder turbo engine. The dual clutch transmission of the A45 features seven gears, three driving programmes, a double-declutching function and Race Start for optimum acceleration.
Another special feature designed to enhance dynamic performance and driving enjoyment is so-called "Momentary M mode". In C and S mode, this enables the driver to activate manual mode ("M") without having to remove a hand from the steering wheel, by pressing the "up" or "down" shift paddle once. In Momentary M mode the driver experiences the dynamism and performance of gear-shifting in manual mode in all of the automatic driving programmes, with automatic up- and down-shifting into the bargain.
The front view of the A 45 AMG is characterised by the AMG "twin blade" radiator grille and the cross strut in the AMG front apron, both painted in matt titanium grey. Striking black flics surround the large cooling air intakes at the sides. An interesting side view is guaranteed by the AMG light-alloy wheels in twin-spoke design and the side sill panels with inserts in matt titanium grey. The AMG rear apron with its highlighted air outlet openings at the sides features a diffusor insert and trim in matt titanium grey. Two square, chrome-plated tailpipes of the AMG sports exhaust system with exhaust flap add an appropriately bold finishing touch.