BMW’s modern turbocharged inline-six engines share a layout, but each has a different story. In this video, we explain five gasoline engine families: the N54, N55, S55, B58, and S58.

Why did BMW move from the N54’s two turbos to the N55’s single twin-scroll turbo? What makes the S55 and S58 different from the engines in BMW’s regular performance models? And how did the B58 end up in the Toyota GR Supra?

We’ll follow the evolution from the 335i to today’s M cars, covering the engineering changes, the cars each engine powered, and the details enthusiasts still talk about.

Which one would you choose for your garage: N54, N55, S55, B58, or S58? Let me know in the comments.

*Credits:* If you recognize footage or an image in this video that should be credited, please leave a comment with the creator’s name and source so I can add the proper credit here.

00:00 N54
02:17 N55
03:54 S55
05:52 B58
08:02 S58

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