Mercedes-Benz working on a naturally aspirated version of the 5.5-liter V8 engine

Article by Christian Andrei, on January 21, 2011

Mercedes-Benz’s twin turbocharged 5.5-liter V8 engine will power the recently unveiled S 63 AMG, CL 63 AMG and CLS 63 AMG, with ratings between 525 hp and 577 hp.

However sources say that the successor to the SLK55 AMG that will be showcased at next year's Frankfurt motor show will receive a yet-to-be revealed naturally aspirated version of Mercedes-Benz's new 5.5-liter V8. The new performance roadster has been tuned by AMG's powertrain department.

It is expected to have an output of 422 hp, which is 62 hp more than the 5.4-liter V8 used by the outgoing SLK55 AMG.

The new 90-degree engine will also feature a cylinder cut-off mechanism as a way to cut consumption. Insiders also say that AMG will keep the naturally aspirated 6.2-liter V8 in the facelifted C63 AMG that’s expected to arrive in North America in early 2011.

But the AMG variant of the upcoming two-door CLK replacement is likely to adopt the same naturally aspirated 5.5-liter V8 engine as the new SLK55 AMG.

The new C-class coupe lineup is headed by the C55 AMG coupe, which will lead to a Black Series model that will rival the limited-production BMW M3 GTS. [via autoweek]

There is no doubt that the new 2012 Mercedes-Benz SLK55 AMG is the most dynamic SLK so far. It is powered by a new AMG 5.5-liter V8 engine that produces 415 hp of max output and 398 lb-ft of peak torque, giving the 2012 SLK55 AMG that ability to outperform its direct rivals.

This new V8 engine features cylinder shutoff that allows for superb performance as well as outstanding fuel efficiency. This high-performance engine is well supported by the AMG sports suspension with Direct-Steer system and Torque Vectoring Brakes as well as three-stage ESP.

In fact, the new 2012 SLK55 AMG could accelerate from nil to 60 mph in just 4.5 seconds, and reach an electronically limited top speed of 155 mph. Taking care of deceleration and stopping power is the AMG high-performance braking system.

As for its looks, the new 2012 Mercedes-Benz SLK55 AMG comes with unique AMG light-alloy wheels and exclusive AMG body styling with AMG spoiler lip as well as two chrome-plated twin tailpipes at the rear – all giving the vehicle a distinct sporty appearance that is not only stunning but is also breath-taking.

This new 2012 Mercedes-Benz SLK55 AMG is part of the third-generation of the SLK that was introduced in June 2011. It is an embodiment of the new AMG brand’s claim of "Driving Performance" in the compact high-performance roadster segment. True enough, it stands out among high-performance roadsters in terms of driving dynamics, sportiness, high-technology and low fuel consumption. The new 2012 SLK55 AMG will be available in the United States starting early 2012.

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