The current V8 powered BMW 5 and 6-Series vehicles are by no means slow but even still, there could always be more. While 400 horsepower from a twin turbocharged engine can catapult the 2012 650i and 550i to 60 mph in under five seconds, BMW is holding back on the power and acceleration. The same powerplant can be found in the 750i and in that limo, 445 horsepower is present thanks to BMW’s Valvetronic timing and lift system. When the 2013 model year hits however, the 7 will donate its higher output mill to further invigorate its 5 and 6-Series siblings.
The Valvetronic equipped V8 can not only be found in the 750i but in the upcoming 6-Series Gran Coupe “four door”. According to Car and Driver Magazine, the powerplant (named N63Tü) will soon go into the other 650i models as well as the 550i and 550i GT. Not only will power jump up but torque will be boosted as well. For 2013, the twin turbo 4.4 liter will twist the concrete with 480 lb-ft of torque. Despite the seemingly similar eight cylinder lineup, the engine found in the X5 and X6 4.4 will still make do with 400 horsepower.
