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The 2011 BMW 3-series coupes and convertibles aren’t the only ones receiving the company’s new N55 turbocharged I-6. For 2011, all 135i models will be fitted with the engine, in addition to a new dual-clutch transmission.

Although the new turbocharged 3.0-liter I-6 receives variable valve timing, the largest departure from its predecessor -- the N54 -- lies with its forced induction. BMW replaced the twin-turbocharged setup from the last engine with a single, twin-scroll turbocharger. BMW says the new N55 cranks out 300 hp and 300 lb.-ft. of torque, the latter delivered from 1200 rpm through 5000 rpm.

Also new is the availability of a seven-speed dual clutch transmission, which replaces the previous optional transmission, a six-speed automatic. BMW claims a 2011 135i, when fitted with the DCT, will sprint from 0 to 60 mph in 5 seconds flat, while the convertible takes 0.3 seconds. Of course, in typical BMW fashion, we think those numbers are conservative -- we’ll let you know once we’ve driven the new cars.

The revised 135i is expected to reach BMW showrooms as early as March, although pricing has not yet been announced.

source: automobilemag

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