N55 TwinPower to replace N54

[LeMansX5]

Other than in 335i coupe & cabrio, Z4 sDrive35is & Z4 sDrive35i, N54 engine will be replaced with Twin-scroll N55 engine starting with 2011 models in Spring 2010. N55 is supposed to bring 10% reduction in fuel consumption.

The new six-cylinder (N55 designation) develops maximum output of 300 hp at 5,800 rpm, with peak torque of 300 lb-ft available all the way from 1,200–5,000 rpm. This is the same level of performance as the current 3.0-liter twin-turbo six-cylinder but with the innovation of twin-scroll technology and the integration of VALVETRONIC throttle-less intake technology, this new engine promises even better throttle response and even more fuel efficiency. Thanks to VALVETRONIC, VANOS, and the twin-scroll turbocharger housing, peak torque is reached 100rpm earlier than with the previous engine, and engine boost response is improved across the entire engine speed range.

135i - In order to enhance the sporting character of the optional 7-speed Double-Clutch Transmission, the shift paddles now feature dedicated paddles for upshifting and down shifting. The driver now pulls the right paddle for upshifts and the left for down shifts. Manual shifts may also be accomplished via the console mounted e-shifter.

[Kewl X5]

So, will 2011 X5/X6 get the N55 or stick with the N54?

[LeMansX5]

Originally Posted by Kewl X5

So, will 2011 X5/X6 get the N55 or stick with the N54?

N55.

[AzNMpower32]

I hope we don't lose that sharp throttle response with the introduction of Valvetronic. Despite what BMW claims, every Valvetronic car I've driven has had a throttle response that's inappropriate for a sporty car.