Mercedes-Benz will allegedly drop the twin-turbo V8 5.5-liter after the current-gen S63 AMG.
The M157 is a Euro 6-compliant twin-turbo V8 5.5-liter gasoline engine outputting 585 bhp (436 kW) and 900 Nm (664 lb-ft) in the 2014 S63 AMG. According to AMG chief Tobias Moers, the mill cannot receive a power hike without a negative impact on its reliability.
He refused to mention if other S-Class models will receive this engine but it is believed the AMG versions of the forthcoming coupe and convertible will also get it, along with updated versions of cars which already have this engine, like the CLS 63 AMG and E63 AMG.
Chances are we won't see it in the next-gen E-Class (due in 2016) or other brand new models outside the S-Class family. The all-new C-Class will get an AMG version powered by what is believed to be a V8 4.0-liter developed by bonding two 4-cylinder 2.0-liter turbocharged engines from the A45 AMG. The same power unit is expected to reside under the hood of the 911 competitor known internally as the C190 which will probably receive the SLC moniker.
CarSales believes big AMG models will feature a hybridized version of the aforementioned V8 4.0-liter engine based on Moers' statement according to which hybrid and electric power are part of AMG's future.