Originally Posted by seanwillnotreturn
Where does this thoery come from? I am not sure what's the M diesel offering in Europe. But 3 traditional turbo wont work for 6 cylinders, it's basic mechanism. The tri-turbo in rumor is a electric turbo (more like a motor) working at low end to keep traditional turbos alive and disconnected where exhaust start to take over the job.
If the gen to come is to utilize bigger turbos pursuing high end at cost of low end reponsiveness that N54/55 is good at, which is most likely the case, it's not worth the wait at all.
Nobody is going to be fine with a lighter and less powerful M5.
It's not "theory" that a straight six can have three turbos...