BMW premieres new inline 6-cylinder twin-turbo engine in M version of X4

(October 1, 2015) With the introduction today of the new BMW X4 M40i, the successful BMW X4 has gained a new top model. BMW says that in the Sports Activity Coupe segment, the BMW X4 M40i will set new standards with enhanced driving dynamics and best-in-segment acceleration. It  will be available at dealers starting in February.

The X4 M40i introduction marks the world premiere of the newly developed M Performance TwinPower Turbo inline 6 cylinder engine. The engine delivers 355 horsepower at between 5,800 and 6,000 rpm from its three-liter displacement, providing a maximum torque of 343 lb-ft.

With the high-performance engine, the BMW X4 M40i delivers best-in-class acceleration, running the sprint from 0-60 mph in just 4.7 seconds.



The newly developed engine combines its high performance with exemplary fuel economy, according to BMW. BMW says the lightweight, thermodynamically optimized aluminum engine has been constructed with a closed-deck design. In this type of construction, the water jacket surrounding the cylinders is sealed at the top, which endows the crankcase with an exceptionally high degree of stiffness.

In addition to a higher level of turbo boost pressure and an increase in the amount of fuel injected, the engine has been fitted with an aerodynamically tuned air intake manifold as well as an exhaust system optimized both in terms of back pressure and sound characteristics in order to enhance performance. A separate oil cooler guarantees that the optimum operating temperature of this extremely powerful engine is maintained under all driving conditions.

The exterior of the new BMW X4 M40i makes it stand out as a clear member of the BMW M Performance family. Exclusive Ferric Gray metallic accents on the front of the vehicle and side mirrors, as well as the exclusive 20-inch M light-alloy double-spoke wheels with optional Michelin Pilot Super Sport tires and the sport exhaust system with valve control and Black Chrome tailpipes on both sides emphasize the unique character of the new BMW X4 M40i.

The M leather wrapped steering wheel, M gear shift lever, sport seats, model-specific door sills and “X4 M40i” digital lettering on the instrument cluster decorate the interior, assuring immediate recognition as a BMW M Performance model.

The specially tuned sports chassis of the new BMW X4 M40i provides excellent driving dynamics at an advanced level with stronger springs and stabilizers, increased camber on the front axle, and adaptive dampers specifically tuned to M Performance specifications. The BMW xDrive all-wheel drive system has been recalibrated with more power routed to the rear wheels during normal operation. 

BMW says the Performance Control ensures a responsive steering with more road feedback as well as confident dynamics.