Yes, you read that right. BMW, in its race to prove that it is the automaker leading the technology race, has finished it: It is preparing a quad-turbo diesel engine, which will be worn in the upcoming (2016) 750d. Already one of the companies that have triturbo engines in their arsenal, it announces that it will present the four-turbo engine for the first time in a concept of a diesel 750 and will then install the the quad turbo in six-cylinder petrol engines.
Although BMW hasn't given details of the new engine, it's expected to offer giant horsepower compared to the others. Expect about 408 horsepower and 590 pft of torque with reasonable economy.
The advantage here seems to be the linear performance and in a wider rpm range (in rather huge range) of the torque, as well as the immediate response of the engine. We still don't know if these turbos will be regular or electric, but what we do know for sure is set up them, since there will be two smaller units for low revs and two larger units for when the revs increase. Essentially, it's... doubled the setup of the BMW biturbo engines we know today and it works differently from the tri-turbo which has a small turbine for very low revs, a larger one that "inflates" at around 1500 rpm and another small one that opens together with the larger one at higher revs. Despite the strangeness of it, it works quite well and gives the quad turbo a chance to work well too.
Tip: Although BMW is not the first car manufacturer to use four turbos in one engine (Bugatti did it in 1991), who doesn't jump at the idea of a six-cylinder, four-turbo (I love that word) M?
The photo, from (foreign) Topspeed
