The World’s Most Powerful Series Production Car

from Aero Gizmo (451 articles)

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The World’s Most Powerful Series Production Car

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December 29, 2005 At the extreme outer limits of automotive performance, several marques continually push the boundaries. For a long period of time, the MacLaren Mercedes F1 was the world’s fastest car, before Koenigsegg lifted the crown. The specifications of the outrageous Veyron waited some time before going into production, but now the mantle of the world’s fastest roadgoing car rests safely with Bugatti. The title of the World’s Most Powerful Series Production Car will change in 2006 though when the new Mercedes-Benz S 65 AMG becomes available. Its ultra-powerful AMG 6.0-litre V12 biturbo engine delivers performance that many sports car drivers can only dream about: it accelerates from 0 to 100 km/h in 4.4 seconds and 0 to 200 km/h in just 13.3 seconds. The compelling top-of-the-line model of the brand new S-Class delivers 450 kW and reaches peak torque of 1000 Nm – more than any other vehicle in this segment.

The standard specification of the new S 65 AMG includes a new AMG sports suspension based on Active Body Control, the unmistakable AMG bodystyling, multi-piece 19-inch AMG light-alloy wheels and DIRECT SELECT gearshift with AMG steering-wheel gearshift paddles.

The use of the new, innovative AMG high-performance composite brakes with twin sliding callipers at the front further illustrates the unique technological prowess of the powerful AMG Saloon.

Twelve-cylinder biturbo engine with know-how from motorsport

This exclusive performance is made possible by the 5980-cc V12 engine developed by Mercedes-AMG. The engine’s credentials are outstanding: maximum output of 450 kW/612 hp is maintained from 4750 to 5100 rpm, while the maximum torque of 1000 Nm can be called on from 2000 to 4000 rpm. Even as low as 1000 rpm, the AMG V12 biturbo engine already delivers 570 Nm of torque to the crankshaft, while 750 Nm is on tap at 1500 rpm. When designing and building the V12 engine the AMG designers drew on the vast know-how amassed over many years of motorsport involvement. The AMG V12 engine has a precision-balanced crankshaft made out of high-strength materials, forged pistons made out of special material which is extremely resistant to temperature and pressure, a more effective oil-spray cooling system with a separate individual nozzle for each piston plus larger piston pins. The main and big-end bearings are also made out of improved materials to compensate for peak temperatures and pressures more effectively. The charge cycle in the cylinder heads benefits from optimised combustion chambers and longer opening times of the intake valves. A modified oil pump ensures that all lubrication points are supplied with oil - even in highly demanding conditions. An engine oil cooler is integrated into the AMG front apron, with an additional engine coolant radiator located in the wheel arch.

Highly efficient charge-air cooler

The charge-air cooler has also been redesigned with a low-temperature radiator in the front of the vehicle that is around 70 percent larger. The system works on the principle of the air/water heat exchanger for particularly effective cooling of the intake air (which has been compressed by the turbo-chargers) before it enters the combustion chambers. The increased surface area of the low-temperature radiator provides a 25 percent reduction in in-take temperature and guarantees high power and torque output under all operating conditions and regardless of the outside temperature, even when the engine is operating at full load. The housings of the compressor and turbine in both turbochargers as well as the turbine and compressor wheels have been enlarged to cope with the maximum charge pressure of 1.5 bar.

The electronically controlled fuel supply with newly developed components operates with a variable system pressure between 3.6 and 5.0 bar. Depending on the power requirements and outside temperature, the fuel pressure is variably controlled almost instantly. The engine management system translates the command from the accelerator within milliseconds, delivering an extremely fast response from the engine in all load situations.

AMG sports exhaust system for typical AMG twelve-cylinder vocals

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