M Sport Technic package, alongside the upgraded M Sport brakes, M seat belts and extended Shadowline trim including panoraminc tilt & slide sunroof and BMW M Y-Spoke alloys in Jet Black. Other Extras: Harman Kardon, xDrive, adaptive LEDs, privacy glass and M Sport brakes. The 840i's 3.0-litre turbocharged straight-six is arguably the sweet spot of the 8 Series range - effortlessly quick, exceptionally smooth and refined, but still capable of delivering the proper GT experience that makes the 8 Series such a special car.