2012 BMW 335i xDrive Coupe: Evolution of the E9X 335i

LOCATION SPOTTED: Quail Hill (Amagansett)
LOCATION SPOTTED: Quail Hill (Amagansett)

Performance:

  • Acceleration 0 to 60: 4.8 sec
  • Braking 60 to 0: 109 feet
  • Quarter Mile: 13.5 sec @ 105 mph
  • Slalom: 67.2 mph
  • Skid-pad: 0.91 g

BMW has come a long way with the 335i over the past 6 to 7 years. In the U.S., we saw the first 335i coupes and sedans in spring 2006, and the convertibles and xDrive models (like this one) come in late 2006 and 2007 respectively. The 335i was an absolute game-changer for the entry-level luxury sports-car market. The car did 0 to 60 in 4.8 seconds when equipped with the 6-speed manual transmission. That is impressive even by 2013 standards, let alone back in 2006. The achilles heal to the early 335i coupes, sedans, and convertibles was the high pressure fuel pump (or HPFP) recall, that affected some 500,000  BMWs with the N54 engine.

N54

N54

The N54 engine is a true twin-turbo engine developing 300 horsepower and 300 ft lbs of torque at just 1400 rpm. This engine was one of the first turbocharged engine to be produced by BMW and it’s HPFP was problematic. The N55 replaced the N54 in 2010 for the 2011 model year and, thus far, it has been far more reliable. I truly believe this is the right direction for BMW to move in for future 335i (and later 435i) models in the future.

N55

N55

The N55 is not only less problematic, but also more fuel efficient. Because the N55 is a single turbo with what BMW calls a “twin-scroll” function, instead of a true twin-turbo with two separate turbochargers, it gets truly great gas mileage. 29 mpg on the highway in rear-wheel drive configurations is quite good. Tuners may have issues with the sheer engine output losses that are now present with one less turbo in the engine bay, but it is a small price to pay in order to move BMW in the right direction for saving fuel and preserving the reliability of their motors.

 

images of N54 and N55 engines sourced from www.flikr.com

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