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All the three-, four- and six-cylinder petrol engines for the BMW 3-Series model range and the four-cylinder diesel units in the BMW 316d, BMW 318d and BMW 320d are now sourced from the newly developed, modular BMW EfficientDynamics engine family. Features including revised turbochargers help give the new four-cylinder diesel engines even sharper responses, while the three-cylinder petrol engine is a new addition to both the BMW 3-Series model range and the segment as a whole. Making its BMW 3-Series debut is the four-cylinder petrol engine in the BMW 320i Sedan/BMW 320i Touring (combined fuel consumption: 5.9- 5.3/6.3-5.5 l/100 km [47.9-53.3/44.8-51.4 mpg imp]; combined CO2 emissions: 138-124/147-129 g/km). Celebrating their world premiere, meanwhile, are the four-cylinder unit in the BMW 330i Sedan/BMW 330i Touring (combined fuel consumption: 6.5-5.5/6.7-5.8 l/100 km [43.5- 51.4/42.2-48.7 mpg imp]; combined CO2 emissions: 151-129/157- 135 g/km) as well as the six-cylinder petrol unit in the BMW 340i Sedan/ BMW 340i Touring (combined fuel consumption: 7.7-6.5/7.0-6.8 l/100 km [36.7-43.5/40.4-41.5 mpg imp]; combined CO2 emissions: 179-152/164- 158 g/km). Despite their superior power, further improvements have also been made to the efficiency of the engines; fuel consumption and CO2 emissions are down by as much as 11 per cent. The new 320d EfficientDynamics Edition Sedan (combined fuel consumption: 4.3- 3.8 l/100 km [65.7-74.3 mpg imp]; combined CO2 emissions: 113-99 g/km) develops 120 kW/163 hp, yet emits just 99 g/km of CO2 when the eightspeed Steptronic transmission and standard tyres are specified. Indeed, the new transmissions also contribute to the increased efficiency of all variants.

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