BMW is introducing the world’s most powerful six-cylinder diesel engine yet in the BMW 7 Series luxury sedan. This new diesel engine, a 3.0-liter six-cylinder in-line unit, will be featured in the new BMW 750d xDrive and new BMW 750Ld xDrive models that will be available starting July 2016. Based on BMW Group’s latest generation of engines, this diesel unit is a recipient of that BMW TwinPower Turbo technology that employs multi-stage turbocharging with four turbochargers and the recently updated common-rail direct injection system that could generate over 2,500 bar of maximum pressure. Of course, this new diesel is also loaded with an array of technological updates and innovations that should make it superior to its outgoing counterpart in terms of power delivery, pulling power and efficiency.
The new 3.0-liter six-cylinder in-line engine could deliver 294 kW (400 hp) in maximum output at 4,400 rpm and 760 Newton-meters (560 lb-ft) in peak torque available between 2,000 rpm and 3,000 rpm. Amazingly enough, this diesel engine could cough up over 450 Newton-meters (332 lb-ft) of torque at just 1,000 rpm. With these numbers, the BMW 750d xDrive could accelerate from zero to 100 km/h (62 mph) in 4.6 seconds, or 0.3 seconds better than its predecessor. Meanwhile, the BMW 750Ld xDrive could sprint from nil to 100 km/h in just 4.7 seconds. This remarkable and sharper boost in acceleration is mainly attributed to an evolved version of multi-stage turbocharging that now employs four turbochargers instead of just three.
This setup results to a faster buildup of boost pressure at lower engine speeds, which allow for amazingly rapid responses to throttle operations from idle. Thanks to the engine massive yet and sustained wave of thrust as well as to an eight-speed Steptronic transmission that is capable of sending most of this power to the wheels, both BMW 750d xDrive and BMW 750Ld xDrive are able to achieve immediate and intense bursts of tempo under throttle inputs at higher speeds.
Also, both the BMW 750d xDrive and BMW 750Ld xDrive have an electronically limited top speed of 250 km/h (155 mph). In the past, such amounts of ferocious power and dynamism come at the expense of fuel economy. But that is not in the case of the diesel engine fitted in the new BMW 750d xDrive and BMW 750Ld xDrive. This engine maybe the most powerful diesel unit, but it is simply superb in the areas of fuel efficiency.
Compared to its predecessor, this new six-cylinder in-line engine delivers 14 kW (19 hp) more output and 20 Newton meters (15 lb-ft) more torque; and its average fuel consumption and emissions are lower by 11 percent. In fact, the new BMW 750d xDrive and new BMW 750Ld xDrive consume between 5.9 liters and 5.7 liters per 100 kilometers – or between 47.9 mpg and – 49.6 mpg imp (average, combined), and emit between 154 grams and 149 grams of carbon dioxide per kilometer (as per EU test cycle).