This past weekend BMW took the wraps off its refreshed 3-Series coupe and hardtop convertible models. In brief, the two-door variants of the 3-Series receive revised exterior styling and a new, more responsive and fuel-efficient single-turbo 3.0-liter straight-six for the 335i models.
Beginning with the diesel range, the updated 2.0-liter four-cylinder unit in the 320d Coupe and Convertible models that complies with the EU 6 emission standards that won't go into force until 2014, now delivers 184HP and 380Nm of torque, up from 177HP and 350Nm.
In the case of the 320d Coupe, this has shortened the 0-100km/h (62mph) sprint by 0.4 seconds to 7.5 seconds, while at the same time reducing consumption by 1.0mpg US to 50 mpg US or 4.7 lt/100km and lowering emissions by 3g/km to 125g/km.
The values for the 320d Convertible are 0-100km/h (62mph) in 8.3 seconds, consumption is 46.1 mpg US or 5.1 lt/100km and emissions 135g/km.
BMW says that 320d Coupe is capable of reaching a top speed of 236km/h or 147mph with the Convertible attaining 228km/h or 142mph.
Similar improvements have been performed on the 325d's 3.0-liter six-cylinder diesel unit. Engine output is 7HP higher at 204HP, and torque is up from 400 to 430Nm enabling the Coupe to shave 0.4 seconds off its 0-100km/h (62mph) time, that now arrives in 6.9 seconds.
Even though fuel consumption remains the same at 41.3 mpg US or 5.7lt/100km, CO2 emissions are lower by 2g/km at 151g/km. The 325d Convertible's equivalent values are 7.5 seconds, 38.5 mpg US or 6.1lt/100km and 160g/km of CO2.
Finally, the 335d Coupe's diesel has also been tweaked resulting in an improved fuel consumption figure and lower CO2 emissions. It now records 35.6mpg US or 6.6lt/100km on the combined cycle, an improvement of 0.5mpg US, and 174g/km.
Note that the revised four-cylinder and inline-six diesels engines also made their way under the hood of 3-Series sedan and Touring models.
The 2011 model also marks the introduction of a new entry-level version for both the 3-Series Coupe and Convertible, the 318i.
As with most BMW models these days, the last two digits of the name of this model do not represent the displacement of the engine as the 318i is powered by a straight-four 2.0-litre (and not 1.8L as you'd assume) petrol engine.
This power unit produces a maximum output of 143HP at 6,000 rpm and peak torque of 190 Nm or 140 lb-ft at 4,250rpm. Coupled to a six-speed manual gearbox, the four-pot accelerates the 318i Coupe from a standstill to 100 km/h (62mph) in 9.1 seconds and the 318i Convertible in 10.3 seconds. Top speed in each case is 210 km/h or 130 mph.
In the EU test cycle the 318i Coupé averages 6.3 lt/100 km (equal to 37.3 mpg US) and achieves a CO2 rating of 146 g/km. The respective figures for the 318i Convertible are 6.6 lt (35.7 mpg US) and 154 g/km of CO2.
2011 BMW 3-Series Coupe & Convertible Photo Gallery