• Mar 21, 2007


Lutz unveiles the Cadillac Sixteen concept at NAIAS 2003 in Detroit

It's official. It's been confirmed: Cadillac is preparing a new V12 flagship. That's straight from the mouth of our favorite man in the business, Bob Lutz. On a recent trip across the pond, GM's venerated product guru confirmed in an interview to the British car magazine AutoWeek that they are indeed working on a twelve-cylinder engine, slated to power a new range-topping, import-beating "Cadillac of Cadillacs," a super-luxury-sedan to rival the likes of the Mercedes S-Class and Lexus LS in the grandest of American style.

The new powerplant is being fabricated from two of GM's 3.6-liter 60-degree V6 engines mounted on a common crankshaft. Far from relying solely on cylinder count, sources speculate the engine will also benefit from such features as direct injection and cylinder deactivation, resulting in a 7.2-liter V12 with somewhere in the neighborhood of 600 horsepower and 540 lb-ft of torque.

And just where is GM testing such a behemoth of an engine? In Australia, of course! As has become de rigeur for American automakers of late, GM is relying on its Australian subsidiary to run the development work on the new flagship engine. Holden is reported to have already begun testing mules, based on a Commodore with a stretched-out engine bay, at its Lang Lang test center near Melbourne. Although the Zeta-based Commodore, (a.k.a. the upcoming Pontiac G8) is being used strictly as a test bed for the time being, it could end up providing the underpinnings for the Cadillac megasedan when the time comes.

Lutz has been pushing for a top-tier Cadillac for years now, and the impetus for its development has apparently come from the feedback received by the Cadillac Sixteen showcar debuted back in 2003. Although the showcase V16 engine was ruled out, apparently the V12 has gotten the green light for development. Shoot for the stars and land on the moon, eh Bob?

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[Source: Automotive News - subscription required]



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    • 1 Second Ago
  • 27 Comments
      • 7 Years Ago
      GM really needs to take these development $s and put it towards something that is going to be more competitive with the Accord, Camery, and Altima as well as the Mini, Scion, Sentra's and Civics. The last thing we need is another gas guzzling american pig of a vehicle. Worst part yet is they really have a chance to innovate by offering some disels or dare I say it a disel hybrid before the rest of the market starts to have some offerings. The Saturn hybrid is a joke and embarrasment 32MPG from a hybrid is just sad. Oh well I am just going to invest in Exxon for my retirement.
      • 7 Years Ago
      9. Personally, I think they should concentrate on getting the STS and SRX up to snuff first. If you're weak at $50,000, there'd little point in introducing a $80,000+ car.

      26. GM really needs to take these development $s and put it towards something that is going to be more competitive with the Accord, Camery, and Altima as well as the Mini, Scion, Sentra's and Civics. The last thing we need is another gas guzzling american pig of a vehicle. Worst part yet is they really have a chance to innovate by offering some disels or dare I say it a disel hybrid before the rest of the market starts to have some offerings. The Saturn hybrid is a joke and embarrasment 32MPG from a hybrid is just sad. Oh well I am just going to invest in Exxon for my retirement.

      I agree with both these statements. No one wants an $80k Cadillac. Work on what you've got before you try to enter into that realm.

      • 7 Years Ago
      How is GM going to implement cylinder shutoff?
      Split the short roller follower into two parts, and add lost motion spring?

      A V6 is the bad half of a V12, an inline6 is the good half.
      So you shutoff one entire bank.

      Isn't the max torque for the 6L90 531ft-lbs?
      • 7 Years Ago
      Without Bob Lutz GM would have sunk by now. He has done a great job with the high-end GM products and this new V12 Cadillac should make a great flagship for all of GM.
      • 7 Years Ago
      Normally this would be a great idea, but GM's not swimming in cash yet, and they seem to have been spending a lot of resources on niche models. Each of those dollars doesn't go towards making the next Chevy/Pontiac/Saturn family cars better.

      I would've waited until their cash situation was a little more certain, that's all.
      • 7 Years Ago
      It does sound awesome but what would it have taken to do a V12 from the truck I-6 they have now? You know port the heads and mount them on a common crankcase. I am aware its a truck engine but atleast its more creative not just stuffing two of what's in the parts bin together.
      • 7 Years Ago
      Let's see how much plastic and substandard leather hides they can use in the production process.
      -----------------------------------------------------
      Have you just emerged for a cave that is devoid of technology? Go to the GM link and read up on the GM of the last 15 months. Get over the crappy interior barbs, that is so outdated.

      Stop living in the past.
      • 7 Years Ago
      Isn't that Bob Barker? Must be the show case show down!
      • 7 Years Ago
      Um, wouldn't two V6s on a common crankshaft be a W12 and not a V12? I thought a V12 was two I6s.
      • 7 Years Ago
      How does two V6s with a common crankshaft equal a W12? Why would a crankshaft be at the top of the head? Even an X12 would be a better guess than W12...haha....W12...
      • 7 Years Ago
      Would having 2 V6's substantially save fuel? Maybe even shut one off for local driving? That'd be sweet.

      Does having 2 also produce the same amount of torque and horsepower?
      • 7 Years Ago
      The Sixteen's 16 cylinder was definately over the top and unnecessary. I do hope the V12 flagship keeps much of the Sixteen's appearance. Those long and low proportions simply blow away everything in even that exhaulted class. Such a car would be a great return to the world class vehicles of Cadillac's past.
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