AMG developing a naturally-aspirated 5.5-liter V8 - report

2012 Mercedes C-Class Coupe leaked photo, 560, 07.01.2011

Will be used in the SLK55 AMG and C55 AMG Coupe

According to a recent report, Mercedes is developing a naturally-aspirated version of the twin-turbo 5.5-liter V8 used in the S63 AMG and CLS63 AMG.

Details are limited, but the new engine will reportedly produce 422 hp (315 kW / 428 PS) and feature multi-cylinder deactivation for improved fuel efficiency. While nothing is official, it is rumored to debut in the upcoming AMG variants of the SLK and C-Class Coupe.

Oddly enough, the C63 AMG sedan and estate will reportedly retain the 6.3-liter (6208cc) V8 with 451 hp (336 kW / 457 PS) and 443 lb-ft (600 Nm) of torque. Likewise, the Black Series Coupe will also use a modified version of this engine but previous rumors have suggested it will feature the twin-turbo 5.5-liter V8.

Source: Autoweek via Autoblog

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mmr66

I cant wait to ride in the c63 black coupe i think it will be amazing.

January 13, 2011 4:03 pm

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siranto

What would be the point of having 2 naturally aspirated AMG V8 engines?

January 13, 2011 7:49 pm

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1 reply

bboothy

I fail to see the point of the 6.2, and 5.5 is absurdly large as well. BMW's new ///M V8 is only 4.0 but still grinds out 415HP despite being lighter than the I-6 which preceded it. Its hard to get the torque without the displacement, I admit. The V8 arms race is all but over as consumer demand switches to small, light and efficient motors. I want more bang for my buck, not maximum bang...

January 14, 2011 3:27 pm

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norther

... the same point of having two AMG "rated" engines/models. an 63 and a 65. in a word, STUPID.

January 13, 2011 8:08 pm

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ACERBUS

C63 AMG BLACK SERIES? http://www.worldcarfans.com/community/photo/9a7Z6Q2D

January 14, 2011 10:06 am

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scratchy996

i bet this thing will sound great !

January 14, 2011 10:07 am

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ACERBUS

2011/2012 C63 AMG here http://www.worldcarfans.com/community/photo/1ThbarhU

January 14, 2011 10:08 am

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GTurbo

AMG finally gets its soul back! I got 55 on it!

January 14, 2011 9:15 pm

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mikemikemikemike

Why does aspiration really matter?

January 15, 2011 2:39 am

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HEMI426

While bmw makes me sad, mercedes makes the day with this powerhouse. No small things here.

January 18, 2011 2:19 pm

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Don't they already have a 5.5L (5.4L) 388HP engine? So it has 425HP... big deal? Infinity has 5.6L that makes 420HP... Ahhh I dunno. Nothing to write news about, IMO. Unless it has some best-in-class fuel economy.. which it won't.

January 19, 2011 11:03 am

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January 13, 2011 3:00 pm By Michael Gauthier

Filed Under: German, Mercedes-Benz, Rumours

Tags: AMG , C-Class Coupe AMG , C63 AMG Coupe , 2012 C63 AMG Coupe , 2012 SLK , 2012 SLK-Class , SLK , SLK-Class , SLK AMG , C55 AMG ,
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