The 335i always has been and remains fantastic to drive. The EPA mileage has improved from 17 mpg in the city and 26 mpg on the highway to 19/28. The top speed for the 2011 is 130 mph on regular models and 150 mph on cars equipped with the Sport package. Thus, the new car might not match the N54-powered 335i’s acceleration times. Of course, we and many others figure the N54 was highly underrated from the factory and that the N55’s official output numbers might be more realistic. Invariably, the company is pretty conservative with its claims, as we recorded 4.9 seconds for the last 335i we tested. Drive 2011 manual#There’s no improvement in the 335i’s performance, with BMW claiming a 0-to-60-mph time for the manual model of 5.4 seconds and 5.6 seconds for the automatic. The car’s 300 hp, delivered at 5800 rpm, also is unchanged from that of the N54. As a result, the new engine delivers its 300 lb-ft of torque at 1200 rpm, 200 revs earlier than the N54’s identical output. The exhaust gas pulses from the front and back of the engine are fed separately to the two scrolls of the single turbo, thus minimizing lag because there’s no delay in spooling up. The N55 is notable because it marries direct fuel injection, turbocharging, and Valvetronic variable valve lift for the first time on a BMW inline-six. (To confuse things, BMW dubs the new engine TwinPower in reference to the turbo’s twin-scroll design.) BMW has said it is holding off on producing higher-output versions of the brand-new N55 because it has confidence in the durability of the N54 to raise the boost for more horsepower. Called the N55, this inline six-cylinder engine uses a single, twin-scroll turbocharger, as opposed to the twin-turbocharged N54 engine that still powers the 335is. These changes have now been carried over to the coupe (taillight pictured below) and convertible models for the 2011 model year.īMW has made two other, more significant changes to the 3-series lineup for 2011, introducing the sportier 320-hp 335is and adopting a new 3.0-liter turbocharged engine in all 335i models except the 335is. Inside, the car received the latest version of iDrive and some improved materials. For the 2009 model year, the BMW 3-series sedan and wagon received a minor face lift that included new front and rear lights and a modified trunklid, grille, and front bumper.
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