2011 Mercedes CL AMG Goes Biturbo

When the Mercedes-Benz CL AMG rolls into dealerships in November, a new 5.5-liter biturbo engine will replace the naturally aspired AMG 6.3-liter V-8 engine.? The new AMG engine develops a peak output of 536-hp and maximum torque of 590-lb.ft. ?In conjunction with the AMG Performance Package, these figures increase to 563 hp and 664 lb-ft.

The new engine uses a unique combination of innovative high-tech systems such as direct gasoline injection, twin turbochargers, air/water intercooling and the Controlled Efficiency stop/start function.

Despite an increase in horsepower and torque as compared to the naturally aspirated V-8, AMG engineers have been able to reduce fuel consumption by 27 percent and CO2 emissions by approximately 30 percent.

The CL63 AMG accelerates from zero to 60 mph in 4.4 seconds, and has a top speed of 155 mph (electronically limited). With the AMG Performance package, the high performance Coup? reaches the 60 mph mark in 4.3 seconds and reaches a top speed of 186 mph (electronically limited).

Like the existing AMG 6.0-litre V-12 biturbo engine, the new eight-cylinder direct injection unit uses very efficient air/water intercooling. The low-temperature cooler with its water circulation is mounted in the V between the cylinder heads to save space. It effectively cools down the intake air compressed by the turbochargers before it enters the combustion chambers, and maintains a constantly low intake temperature under full load.