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New Mercedes AMG V-8 Delivering Near-I-4 Mileage

Green performance without the hybrid?

by on Jul.21, 2011

Mercedes's AMG division claims the new M152 engine going into the SLK55 AMG will deliver big gains in power - and a 30% bump in fuel economy.

With the upcoming launch of its latest powertrain, AMG, the Mercedes-Benz performance division, claims it will be able to deliver the muscle of a traditional AMG V-8 with the mileage of a compact 4-cylinder powertrain.

While that might be a mild exaggeration, the claims are nonetheless impressive if the new 5.5-liter V-8 – developed specifically by AMG – actually can yield a 30% improvement in fuel economy compared to the brand-within-a-brand’s current 5.5-liter V-8.

Until recently, fuel economy was way down the list of attributes Mercedes officials were likely to emphasize – especially at AMG – but studies show that even the affluent buyers who ante up for cars like the Mercedes-Benz SLS AMG supercar now list mileage as a concern.

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The new powertrain will find its first application on the AMG-upgraded version of Mercedes’ compact roadster, the new 2012 Mercedes-Benz SLK 55 AMG.  Significantly, the 30% mileage improvement comes despite a 60 horsepower bump, to 415 hp, with torque jumping from 376 to 398 lb-ft on the new model.

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