Although BMW is working on the next generation 7 series, they also made some refinements for the current model. BMW decided to give a new 3-liter straight-six turbo-diesel engines to 7 Series for the European market.
The new engines benefit from 48-volt mild-hybrid technology. The integrated starter-generator can provide an extra 11 hp when needed. As a result, the new 3-liter diesel engine has a better fuel economy and can save 0.4 to 0.6 liter per 100 kilometers.
The first models to gain new updates are 730d and 730d xDrive. These models are equipped with an inline straight-six with 286 hp and 650 NM of torque. These figures have improved 21 hp and 30 NM. The 0 to 100 kph is 5.9 seconds for the normal model and 5.6 seconds for the xDrive version.
The next model is 740d xDrive. Though this model uses the same engine as a previous one, the 3-liter diesel can pump out 340 hp and 700 NM of torque on the 740d. This model also gains 20 hp and 20 NM. Maximum torque is available between 1750 and 2250 rpm. BMW 740d xDrive can accelerate from 0 to 100 kph in dead 5 seconds, 0.2 seconds better than before.
Other highlights for new engines are new exhaust gas filtration system and optimized particulate filter.