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Old 01-17-2010, 04:30 AM   #1
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2011 BMW 3 Series coupe and convertible get refreshed, 335i gets single turbo

Filed under: Convertible, Coupe, Performance, BMW, Luxury

2011 BMW 3 Series - Click above for high-res image gallery

The next-generation BMW 3 Series isn't that far off, with the sedan expected to debut sometime in 2011 as a 2012 model. Yet the Munich brand isn't sitting on its hands in the meantime - the current 3 Series coupe and convertible are getting a mild refresh and updated powerplants this spring for the 2011 model year. The most immediately noticeable change are headlamp clusters that get a subtle reshaping to go along with a wider grille and reworked lower front fascia. At the rear, the taillamps retain the same shape, but the reflectors are redesigned with some of the light-pipe styling found in other recent Bimmers.

The 3 Series coupe will now be offered with xDrive all-wheel drive, while the 3 Series convertible gets a new solar reflective leather upholstery that BMW claims helps keep seat temperatures down when the lid is open.

The most significant updates come underhood, where the much lauded twin-turbocharged 3.0-liter inline-six is being replaced by a new single turbo version. The revised engine, dubbed N55, has recently been launched in the 740i and the 535i Gran Turismo. The twin scroll turbo has dual exhaust inlets that allow the engineers to better balance the pulses coming in to spin up the turbine faster. This is expected to reduce the turbo lag that some drivers complained about with the outgoing twin turbo setup.

BMW also claims it has reduced cold-start emissions by routing all the exhaust gases through a single, larger catalytic converter that heats up faster. On the intake side, the throttle is eliminated thanks to the addition of BMW's Valvetronic variable valve control system. The N55 also gets direct fuel injection. The end result is the same 300 horsepower and 300 pound-feet of torque as before, but with a fatter torque curve that maintains its peak from 1,200-5,000 rpm.


Gallery: 2011 BMW 3 Series Coupe and Convertible



[Source: BMW]Continue reading 2011 BMW 3 Series coupe and convertible get refreshed, 335i gets single turbo

2011 BMW 3 Series coupe and convertible get refreshed, 335i gets single turbo originally appeared on Autoblog on Sat, 16 Jan 2010 18:00:00 EST. Please see our terms for use of feeds.



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