Various reports suggest that the current-generation Mercedes S63 AMG will be the last model powered by the company’s M157 5.5-liter, twin-turbo V-8 engine.This engine was unveiled in 2010 to replacement the previous naturally aspirated M156 6.2-liter, V-8. According to AMG chief Tobias Moers, the relatively young 5.5-liter has reached its output limits, so it cannot exceed 577 horsepower and 664 pound-feet of torque without threatening reliability.
Of course, the engine will see use in the upcoming S63 AMG coupe and convertible variants, and in every other 63 AMG models in 2014, but you shouldn’t expect to see it in any next-gen AMG models, like the next generation E-Class set to arrive in 2016.
While there are no indication on what engine will replace the 5.5-liter, V-8 engine, AMG is currently developing a new 4.0-liter engine by essentially bonding two of its 2.0-liter, four-cylinder turbo engines together. This new engine will see its first action in the AMG variant of the upcoming C-Class and the upcoming SLC .
There is the possibility of the 5.5-liter engine being replaced by a hybridized version this new 4.0-liter, V-8 engine, but this is pure speculation at this point.
Click past the jump to read more about the 2014 Mercedes S63 AMG.