We can lament the passing of the Mercedes-Benz
M156 6.2-litre V8 until the end of time (and we probably will), but none of our moaning is going to stop Mercedes or the madmen of AMG
from coming up with more modern, forced-induction mills like the 5.5-litre twin-turbo V8, or this, the company's new 4.0-litre twin-turbo V8
. The freshly unveiled mill will make its production debut in the Mercedes-AMG GT
, and based on the stats, it should prove a real honey.
Code-named M178, the new, turbocharged mill comes to party with 510 horsepower, but its big trick is the 479 pound-feet of torque it deploys between 1,750 and 4,750 rpm. Engine, thy name is usable power. The new 4.0 can rev to the same 7,200 rpm redline as the 6.2-litre V8 in the SLS AMG, meaning it should be a jolly good engine to wring out. The two turbochargers, meanwhile, can run to a maximum pressure of 17.4 psi and can spin to 186,000 rpm.
The measure of an engine isn't limited to just its power output. In today's world, it needs to be light. According to AMG, the new 4.0 is just that, boasting a dry weight of just 461 pounds (209 kilograms), thanks to an aluminum crankcase. AMG even cast an eye on the way the engine's fat is distributed, fitting the turbochargers not outside the cylinder banks, like on a typical engine, but in what it calls the "hot inside V" configuration. That allows a lower, more compact engine package whose weight is better distributed.
Sound is arguably one of the AMG engine's most important aspects, and in that important arena, the 4.0 shouldn't disappoint. Slated to debut in the Mercedes-AMG GT, the 4.0 will be paired up with an exhaust that includes variable flaps that open and close depending on things like the transmission mode and throttle inputs. That should allow the GT's new engine to balance the AMG sound we know and love with a more relaxed, mellow and quieter character in everyday driving.
We'll have much more on both this engine and the car it will debut in, the Mercedes-AMG GT, in the coming months. Until then, there's a wealth of nitty gritty information available in the attached press release, from Mercedes-Benz. Scroll down
for a look.