Which BMW Has the B57 Twin-Turbo vs Quad-Turbo Engines? Full Comparison
Photo by Amir Hosseini on Unsplash BMW diesels can be confusing in the best possible way. You’ll see a 540d, a 740d, an X3 M40d… and then you stumble across an M550d or X5 M50d, and suddenly everyone’s talking about “the quad-turbo one”. Same 3.0 diesel family, very different personality. This guide is here to make it simple — what the B57 engine is, how the twin-turbo and quad-turbo versions differ, and (most importantly) which BMW models actually came with each. What is the BMW B57, in plain English? The BMW B57 is a 3.0-litre straight-six turbo-diesel that BMW introduced in the mid-2010s as the successor to the older N57. It’s part of BMW’s modular engine family and was built to cover everything from executive saloons to big SUVs, which is why BMW offered it with different turbo set-ups, including twin and quad turbocharging. If you’re looking at badges, think of it like this: Twin-turbo B57 = the fast, refined, everyday performance diesel Quad-turbo B57 = the rare, flagsh...