The 5.5-liter twin-turbo V-8 found in almost every 63 AMG model will be phased out starting with 2016. That’s not a surprising decision considering that the bonkers 6.2-liter V-8 was also ousted for not being in line with fuel economy levels set by modern turbocharged engines. The replacement is slated to be the internally codenamed M157, a 4.0-liter V-8, and it’s destined for engine bays across the entire Mercedes range.
Essentially a twin-turbocharged and direct-injected variant of the older 5.5-liter V-8 found in the mid-2000s on just about every "500" model, the M157 delivers between 536 horsepower and 577 horsepower in select Mercedes-Benz models sporting the "63 AMG" moniker. The only exception is the all-new Mercedes-AMG C63, which is the first "63" variant to get the new 4.0-liter, twin-turbo V-8 also found in the Mercedes-AMG GT.
The M157 was initially introduced back in 2011 on the S63 and CL63 AMG. Afterwards it was rolled out on pretty much every large Mercedes-AMG model in the lineup. Even though it offers more torque and much better fuel economy than the now-legendary M156 6.2-liter V-8, the new 4.0-liter V-8 replacement will bring even better performance and efficiency numbers, along with an improved throttle response. The last all-new model to get the 5.5-liter will be the convertible version of the S63 AMG Coupe, with its reveal being due in 2016. Every large AMG model introduced after that will get the 4.0-liter V-8 with the so-called "hot vee" positioning of its turbochargers.
Click past the jump to read more about Mercedes-AMG’s new V-8 engine.
Mercedes Will Drop Its 5.5-litre AMG V-8 Engine In 2016 originally appeared on topspeed.com on Tuesday, 20 January 2015 18:00 EST.
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