QV engine internal specs?

it's a cross plane, perhaps to make it a little smoother, being a 90 degree V.

Crank pins on the V6 are 120° apart.

MacGeek said:

Crank pins on the V6 are 120° apart.

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Interesting while neither a cross plane or flat plane by definition the 120° crank certainly gives the QV its unique exhaust note.

Explains why it sounds like two Laverdas

early laverda jota triples had 180 degree cranks, which gave them a unique exhaust note.
later models were 120, like yamaha, and more "civilized".
considering the cylinder deactivation feature is for "civilized" use, they may not have wanted the engine to become nasty in nature when operating in that mode.

Agree, its effectivelly two balanced triples, hence the comment about Laverdas....to me triple makes the best sound....and makes Alfa distinctly different from Maserati and Ferrari

Have there been any engine cutaway pictures for display purposes circulating the web?

lowflyer, guess we crossed on typing.
did you see the interview with the designer too? although what he didn't say is maybe more important, he did say it was unlike most other sixes because it was designed as a double triple because of the deactivation - I'm sure every bike guy who saw it thought, "which one?" or "Jota!"

distinct sound, yeah, firing order/timing degree intervals/v angle, all "non-standard" for a v6 I guess

https://en.wikipedia.org/wiki/V6_engine

good descriptions of issues of different designs - after reading this I'm thinking odd-fire Buick, with a turbo thrown on haha

Outstanding! Love the symmetry of 120s. A nice hint of the flat plane of a 180 but balanced enough for deactivation. Genius! I've heard that most Maserati engines post FIAT group are Ferrari blocks with detuned heads. I am aware of the new Levante's Chrysler 6 as someone pointed out here. Otherwise, the classic Maserati sound is a direct sibling of the Ferrari flat plane V8s. No? Now to read the link...

A cutaway display would be great at auto shows.

John_K_348 said:

Otherwise, the classic Maserati sound is a direct sibling of the Ferrari flat plane V8s. No? Now to read the link...

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Indeed they are. Some good info here on the F154 Ferrari engine family including the QV's F154 V6.

https://en.wikipedia.org/wiki/Ferrari_F154_engine

Wow, you are lucky to have experienced one; Ive had a go or more on a heck of a lot of bikes, but only magazine impressions of those. One used the word pterodactyl to describe it.
Along with everything else I've forgotten, I remembered a few brief mentions of this gem. The internet can be great sometimes, way more information than you could get at the time on a one off, the Laverda V6, designed by Maserati's Alfieri. This is a pretty good read on it, and v6's, so maybe this AR 6 is more Laverda inspired than we thought

https://silodrome.com/laverda-v6/


and a second one created by the man who has the entire "collection" including spares, start up video

Lowflyer said:

Can anybody recognize a bit of QV in the growl of that crazy old bike?

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I listened and I did hear remnants of the qv. That's crazy