BMW Confirms Quad-Turbocharged Diesel I-6
3.0-Liter Engine Bound for the 7-Series, May Come to US
Confirming suspicions of such, BMW announced it would put a quad-turbocharged diesel engine into one of its vehicles, likely the 7-Series large sedan.
According to enthusiast site Bimmerpost, the quad-turbo 3.0L I-6 should make its way under the hood of the BMW 7-Series, where it will produce 394 hp between 4,000 and 4,400 rpm and 561 lb-ft between 2,000 and 3,000 rpm. The engine was announced at the Vienna Engine Symposium last week.
Bimmerpost reports the quad-turbocharged, oil-burning 7-Series will get to 60 mph in 4.5 seconds, with a top speed governed at 155 mph, mirroring that of other German sedans. The engine’s predecessor had a single low-pressure turbocharger feeding two high-pressure units; the new design replaces the large low-pressure turbo with two smaller low-pressure turbos.
The new design will eliminate lag and enable better manners at higher engine speeds, where diesels traditionally run out of steam and devolve into rattly, shaky beasts. A foam cylinder head cover will keep noise and harshness confined to the engine bay, and the new engine will feature smoother power delivery and less vibration, mirroring the characteristics of the company’s other engines.
Bimmerpost reports BMW sought to create a true V-8 fighter with its new diesel engine. Since it’s destined for the high-class 7-Series sedan, its owners won’t appreciate its increased fuel efficiency if it comes at the cost of comfort and luxury. As such, it must conform to the expectations of BMW’s traditionally well-heeled clientele. Its prospects as a future U.S. offering are unknown, but since BMW has been able to weather diesel’s recently flagging reputation thus far, a V-8 alternative like the quad-turbodiesel I-6 could be a good seller here. Further helping the new engine's case is the success of the previous-generation 7-Series' diesel variant, shown here.