Volkswagen Put An Experimental W10 Engine In BMW’s Best M5

The legend of the Volkswagen Group’s rebellious, daring, and absurdist creations pitched and produced under the rule of Ferdinand Porsche’s grandson, the late Ferdinand Piëch, continue to enchant and mystify the automotive community. The team at DriveTribe uncovered and drove a perfect example of this daring absurdity in a YouTube video about an E39 BMW M5 that hid quite an oddity under its hood: A one-of-two experimental W10 engine that Piëch ordered to be created. No, my fat fingers didn’t accidentally press the wrong key — this 10-cylinder engine was created by connecting two narrow-angle V5 engines in the same way VW did with the Passat’s W8 and the Phaeton’s W12.

Now, why would Volkswagen go and put this experimental engine under the hood of a German competitor? Drivetribe presenter Mike Fernie explains that it was due to Piëch’s desire to produce an M5 competitor, but since the Volkswagen Group didn’t have a comparable model at the time, Piëch himself signed off on putting his experimental W10 right into an M5. Then, he reportedly used it as his daily driver because he was so impressed by the outcome. Must’ve been a mighty compelling thing, then.

Now, if you’re familiar with the unique wail of a five-cylinder engine, then you are probably desperate to hear what two narrow-angle V5 engines connected at the crank sound like. Unfortunately it doesn’t have quite the throaty growl that you may expect, though it does sound interesting. But as Fernie points out, that’s kind of the order of the day when it comes to the VW Group’s W-oriented engines. Neither the W12 used in an array of Volkswagen Group products, nor the quad-turbocharged W16 used in the Veyron and other Bugattis are particularly sonorous engines. Go on YouTube and type “straight piped W8 Passat” into the search bar, though, and you’ll find a few videos showing the ripper of a sound that the W8 produces. Anyway, back to the W10.

The owner of the W10 E39 M5 mule tested it out on a dynamometer and found out that it produces 480 horsepower and about 436 pound-feet of torque. Unfortunately I cannot offer any driving impressions from my own experience, but Fernie seems quite smitten with the manual-equipped, W10-powered E39 M5, and I can’t blame him. He’s experiencing a one-of-one driving experience, as the only other W10 known to exist is mounted to a post in the owner’s garage. What a cool experience — I’m only slightly irate with jealousy. Apparently it’s for sale, though, if you happen to have a spare $500,000-ish laying around. If you’re like me and you don’t have a cool half-mil to burn, then we can just watch this video on repeat.