After the rumours saying M series will switch to smaller engines, the M division declared that the next-generation M5 will get a twin-turbocharged V8.
M GmbH boss, Dr. Kay Segler, confirmed the news in an interview for the German publication Auto News, but didn’t offer more details. There is speculation though that it will be a retuned version of the twin-turbocharged, 4.4-liter V8 used in both the X5 M and X6 M that can deliver 555 hp. It might get tweaked to have 575hp for the upcoming M6 coupe and the M5 some voices say.
Other sources say the M5 and M6 will both be equipped with KERS (F1-inspired kinetic energy recovery system). The system can restore energy that is typically lost during braking and can offer an extra hundred hp at the push of a buton.
via 4wheelsnews