BMW is constantly working on ways to make their luxury cars even better.  Their newest project is no different.  They are in the process of updating their already great engine to roll out slowing into new models, including the Chicago BMW M5.

The current engine goes under the code name N54.  It’s a twin-turbo unit that is found in the 1, 3, 5, 7 series and other models, such as the Chicago BMW Z4.  People who drive BMW’s say this engine is great-  it allows the car to perform like a luxury car should.  But, the next phase, N55, is going to be even better.

The #1 goal of N55 is to make each model it’ll be housed in more efficient.  One marked fact is that it will be the first BMW engine to have direct injection, turbocharging, and its Valvetronic system all rolled into one.  Valvetronic alone was used in some three series models before turbocharging was an option.  Valvetronic has some important jobs.  It will lessen throttle loss because it will allow the air to come in more evenly.  Less throttle losses equal a more efficient engine for your Chicago BMW M5.

Another big component to the N55 is the way the air will be split.  The current twin-turbo unit will be condensed into a single unit, but the air will still be able to be split behind a wall that separates the front 3 cylinders from the rear three.  So, you essentially have a condensed twin turbo unit.  The idea behind this science is to reduce lag by making sure the exhaust gas pressure stays even, lower is better.

The new engine is set to roll out slowly.  The first to house it will be the 535i GT, then the X5,  followed by the 2011 3-Series coupe and convertible.  The Chicago BMW Z4, along with the 740i, will most likely get N55 last, since they aren’t due for improvements for a while.

I am excited to drive a BMW model with the new engine and see how the car performs….Stay tuned for more information!