A little after a leaked brochure gave us our first taste of the lightly refreshed 2011 3-Series Coupe and Convertible models, BMW rushed out an official release and a whole bunch of pictures. For the 2011 model year, the Bavarian automaker’s bread-and-butter coupe and cabriolet models receive some minor cosmetic touches and updated powerplants.

The most notable – that is, if you’re a hardcore bimmer fan- changes on the outside concern the widened kidney grille, reshaped LED headlamps, front and rear bumpers with restyled lower fascias, new exterior mirrors and finally, reworked tail light cluster with a new color scheme.

According to BMW, these modifications slightly extend the front and rear overhangs by 1.14 and 0.12 inches respectively.

The only change in the cabin concerns the convertible models and the use of sun-reflective technology to mitigate temperatures on leather seating, armrest surfaces, headrests, and gear shifter. BMW says that this new treatment is able to reduce surface temperatures on dark interior colors by up to 20 Celsius degrees (36 Fahrenheit degrees) and by as much as Celsius degrees (27 Fahrenheit degrees)on light-colored upholstery.

In North America (we’ll bring you details on the Euro spec models shortly), the 2011 3-Series Coupe and Convertible models will be offered once again in two flavors, the 328i and 335i.

As noted in our previous post, the 2011 335i is fitted with BMW’s new twin scroll single turbocharged 3.0-liter straight six, designated N55, that replaces the previous model’s N54 twin-turbocharged 3.0-liter straight six.

BMW says that even though output has remained the same as before at 300 horsepower and 300 lb-ft of torque, the new single turbo engine is more responsive, more fuel efficient, and cleaner-running than its predecessor.

The rear-wheel drive 335i Coupe and Convertible accelerate from 0 – 60 mph (96km/h) in just 5.3 (5.5 coupe automatic) seconds and 5.5 (5.7 cabrio automatic) seconds, respectively, when equipped with a six speed manual gearbox.

The all-wheel drive 335i xDrive coupe is slightly faster at 5.2 seconds (5.3 sec for the automatic model).

The 328i’s 230 horsepower, 200 lb-ft, 3.0-liter inline-6 engine has been carried over unchanged from the 2010 model.

No word yet on the sporty 335is variants with a tweaked 3.0-liter twin-turbo churning out 322HP that were mentioned in the leaked sales leaflet.

In the U.S. and Canada, the 2011 3 Series Coupe and Convertible models will go on sale in Spring 2010, with pricing set to be announced closer to the on-sale date.

Since the current BMW 3-series was introduced it’s faced new competition from the Mercedes C-class and the Audi A4. BMW is fighting back with a revised version that benefits from refreshed looks and a few small but important tech tweaks. Question is, can these changes keep the class leader on top?

Small changes, you say. So what’s new on the facelifted BMW 3-series?

Well, the cosmetics are the most obvious difference. You won’t have to squint hard to spot the new fluted bonnet with shades of the gorgeous CS concept car. BMW has tried to make the car look longer, wider and more elegant. We’d say it’s succeeded: the new Three certainly has more presence and character than before, and the back end in particular looks much more upmarket.

There you’ll find new LED tail-lamps and a re-designed bootlid. Along the sides are new sill panels, while the bumpers are reprofiled front and rear and fitted with chrome strakes to each side of the front foglamps. The kidney grilles are bigger, more like those of a 5-series, and there are new headlamps and mirrors, too.

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