I am sure there are some engine guys on here that will appreciate this:

Celebrating its premiere in the BMW 7 Series model range: the world’s most powerful six-cylinder diesel engine.


BMW TwinPower Turbo technology now features multi-stage turbocharging with four turbochargers and further developed common-rail direct injection – Engine for the BMW 750d xDrive and BMW 750Ld xDrive develops maximum output of 294 kW/400 hp and peak torque of 760 Newton metres (560 lb-ft). (Fuel consumption combined: 5.9 – 5.7 l/100 km [47.9 – 49.6 mpg imp]; CO2 emissions combined: 154 – 149 g/km).

Munich. An impressive spread of innovations mark the new BMW 7 Series luxury sedan out from the crowd. The spread of new features runs from a Carbon Core body structure and BMW eDrive technology in the three BMW iPerformance models to BMW gesture control and Remote Control Parking. And now another new arrival has joined the fray. The world’s most powerful six-cylinder diesel engine is making its debut in the BMW 750d xDrive and BMW 750Ld xDrive (fuel consumption combined: 5.9 – 5.7 l/100 km [47.9 – 49.6 mpg imp]; CO2 emissions combined: 154 – 149 g/km), which come as standard with intelligent all-wheel drive. The new unit generates maximum output of 294 kW/400 hp and peak torque of 760 Newton metres (560 lb-ft).

The new 3.0-litre six-cylinder in-line engine was developed on the basis of the BMW Group’s latest generation of power units. Its BMW TwinPower Turbo technology includes multi-stage turbocharging with four turbochargers and common-rail direct injection, the latest update of which generates maximum pressure in excess of 2,500 bar. These and other technological highlights allow significant improvements to the already exceptional power delivery, pulling power and efficiency achieved by the outgoing engine. The new BMW 750d xDrive accelerates from 0 to 100 km/h / 62 mph in 4.6 seconds (BMW 750Ld xDrive: 4.7 seconds) – an improvement of 0.3 seconds over its predecessor. Much credit for this even sharper dynamic edge can go to a new form of multi-stage turbocharging, which now brings together four turbochargers in place of the previous three. This enables boost pressure to be built up even more quickly at lower engine speeds and therefore prompts incredibly swift responses to throttle applications from idle.



Top-level efficiency: engine output up 5 per cent, average fuel consumption down 11 per cent.

The new generation of the world’s most sportingly gifted six-cylinder diesel engine develops its maximum output of 294 kW/400 hp at 4,400 rpm. Its optimised performance characteristics are reflected most prominently in torque development that gathers pace rapidly and from low engine speeds. Indeed, the engine serves up over 450 Newton metres (332 lb-ft) of torque at just 1,000 rpm and puts its maximum 760 Newton metres (560 lb-ft) on tap between 2,000 and 3,000 rpm. The engine’s large and sustained wave of thrust and the eight-speed Steptronic transmission tuned to make the most of it together ensure that instant and ferocious bursts of pace can also be achieved under throttle inputs at higher speeds. The BMW 750d xDrive and BMW 750Ld xDrive have an electronically limited top speed of 250 km/h (155 mph).

https://www.press.bmwgroup.com/globa...-diesel-engine

 

Without pics it just isn't so ...

 

Not sure their claim stands up to scrutiny.

Wartsila for example, builds a diesel ship engine with 6 cylinders, each with a bore of a little over a yard and a stroke of just short of 3 yards, producing a little over 46,000 horsepower and 2.4 million (yes!) ft-lbs of torque at 102 rpm. The pistons themselves are over 20 ft high and weigh over 5 tons each so probably you will have some trouble fitting this into the average passenger car.

But it is more powerful than that little BMW.

 

Probably should say, the most powerful 6 cylinder diesel motor in a passenger car as I recall Dodge/Fiat has a 6 cylinder diesel motor in their pickups that make more than 400 HP too...

 

Yes. The Dodge / Ram trucks use the Cummins B-series (ISB 6.7L) turbo diesel which is an inline six cylinder comparable to the Powerstroke 6.7L in terms of horsepower and torque. Actually I think they produce slightly less horsepower and slightly less torque than the 2017 Super Duty 6.7L engines do. They produce up to around 900ft.lbs. of torque. It also produces 385HP compared to the SD's 440HP. That said, I can't stand the Cummins engines myself due to the noise they make. It sounds like Fran Drescher in a wood chipper. That's my only real complaint about them. The Powerstroke series has always been less noisy and the exhaust note is pleasant instead of irritating. That's just my opinion of course. The Cummins engines are good motors otherwise. Also, you'd have to buy a Ram to get one and that's always bothered me. Put a good pickup around that engine and I'd probably find it more appealing.

 

Perhaps they meant most powerful in terms of power per cubic inch. That would make more sense. Obviously there are more powerful six cylinder diesel engines.

 

Cummins in a dodge is a waste of a motor