By on April 28, 2008

mercedes-slc.jpgMotor Authority reports that AMG is ditching its 6.2-liter V8 and 6.0-liter twin-turbo V12s in favor of a new 5.0-liter twin-turbo V8. As with Audi's recently-announced downsize from V8 to V6 in the S4, Mercedes claims they're losing the big bore mills to increase fuel efficiency. Not only do Merc's massive 12-pots struggle to break 15 mpg in typical (for a V12) driving conditions, but they lack the low-end shove of previous AMG engines (notably the old supercharged 5.5-liter V8). The "entry-level" version of the new V8 twin turbo– replacing the normally-aspirated 6.2 unit (called a 6.3 for nostalgic reasons)– will boast 570hp and 665 lft.-lbs. of torque. A higher performance unit will get turbo upgrades to create 700hp and 885 ft.-lbs. of torque (to replicate turbo V12 shove). Apparently a "BluePower" (not a Smurf racist group, it turns out) version will offer epic hybrid performance from the same V8. If you just have to have yourself a V12, fill out a pre-order now for the SLC Gullwing, launching in 2010. The tasty retro-coupe will be the last application for Ye Olde 6.2, cranking-out over 600 horsepower, mated to an 8-speed automatic.

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18 Comments on “AMG Joins Engine Downsizing Trend...”


  • avatar
    Qusus

    Smurf racist group. That is pure gold.

  • avatar

    I don’t think it’s a tragedy for high end motoring that Merc’s won’t have V12s, however if Ferrari follow suit it will be…

  • avatar
    SupaMan

    “Smurf racist group….lol…classic.

    Wow, even the performance arm of these companies is starting to realize the negative effect this horsepower war is having. That’s great actually. For BMW’s M Division to turn around and instead of shunning forced induction, they’ll offer it as a means to coax more power without a huge efficiency drop. This should prove interesting to watch.

  • avatar
    AKM

    Funny that AMG dropped the Turbo V8…to re-introduce it 2 engine gens later!

    And does anyone else think the car pictured looks like a rip-off of The alfa Romeo 8C?

  • avatar
    Bruce Banner

    Is that a picture of the SLC Gullwing? It looks amazing.

    EDIT: it’s the 2009 Mercedes-Benz 300SL Gullwing

  • avatar
    Qwerty

    And does anyone else think the car pictured looks like a rip-off of The alfa Romeo 8C?

    I could not get past the tacky large Mercedes symbol on the front.

  • avatar
    moraviapils

    Honestly, I don’t see the point of all of these performance divisions/companies trying to green wash their products. If you can afford a $60,000+ car that has no real practical value (unless you count the grins), you can afford the gas to drive it.

    Leave the smaller engines in cars that mileage-conscious people buy and let the rich people have their toys. :P

  • avatar
    JJ

    that AMG is ditching its 6.2-liter and 6.0-liter twin-turbo V12s

    If you just have to have yourself a V12, fill out a pre-order now for the SLC Gullwing, launching in 2010. The tasty retro-coupe will be the last application for Ye Olde 6.2, cranking-out over 600 horsepower, mated to an 8-speed automatic.

    I’m confused…

    I know AMG offers the 6.2 (6.3) V8 and a 6.0 V12 Biturbo…

    But do they also offer a 6.2 V12 Biturbo, as in 2 different V12 biturbos with just .2 litres displacement difference between them???

    And consequently…will the new Gullwing have the ’63’ 6.2 V8 or a V12?

  • avatar
    thetopdog

    I believe Mercedes does make 2 V12s, the 6.0L (I think) one in the S600, CL600 and SL600, and the 6.5L (I think) version in the S65, CL65 and SL65AMG cars

    I have a very hard time believing that a 570hp twin turbo V8 would consume significantly less gas than a V12 of equivalent power, especially when driven hard.

  • avatar
    Kman

    FWIW, there’s a confusing element to the (otherwise excellent -“Smurf Racist Grp”) article.

    The implication is of two V12s, one a 6.0L TT, the other a 6.2L NA.

    The 6.2L Naturally Aspirated AMG engine is a V8.

  • avatar

    Uh, the copy WAS a bit confusing/misleading. I’ve tweaked Eddy’s sterling text [no irony] here and there. Let me know if I’ve got it right.

  • avatar

    Electric is the way to go – instant torque.

  • avatar
    gaazmon

    Lol, this is funny. I guess AMG read my post about how Benz and BMW should get rid of V12s, and they decided to go along with it. 1 down, 2 more engines to go. Here is the post, second to last one on the page.

    https://www.thetruthaboutcars.com/is-it-time-for-a-us-v6-mercedes-s-class-twin-turbo-i6-bmw-7-series/comment-page-2/#comments

    To clear things up: Mercedes produces two V12s: the base 5.5L that produces over 500hp and the AMG 6.0L that produces 604hp. Both are turbos and have a 5-speed auto.

    I’ve heard mixed things about the difference betweend the 5.5L supercharged vs. 6.2L natural. Supposedly (I’ve never driven either) the 5.5L has more power at the lower RPMs since it has more torque than the 6.2L and it has a 5-speed auto. The 6.2L natural has more higher RPM power and has a 7-speed auto.

    I’m guessing this means a return of the 5-speed auto for the AMG V8’s, so I’m likeing the sound of this.

  • avatar
    CarShark

    I’m guessing this means a return of the 5-speed auto for the AMG V8’s, so I’m liking the sound of this.

    @gaazmon:

    What’s good about that? Aren’t the 7-speeds better?

  • avatar
    doctorv8

    V12s lacking low end shove? Seriously? Well, maybe because the ESP yellow light keeps flashing as the tires struggle to deliver 738 ft lbs to the rear wheels at 2000 rpm….

    Just to demonstrate, try cruising at 60 mph, lock the trans in manual mode, make sure tap the right paddle until you’re in 5th gear (around 1500 rpm), and floor the throttle without tripping the kickdown switch. In about 5 seconds, you will be going well over 100 mph, all in 5th gear. Now that is low end torque, uncontaminated by traction issues.

    The “5.5” you mentioned is actually 5.4L, and while it has a ton of torque too….it’s 200 ft lbs shy of the V12, even if it does come in fractionally earlier in the rpm range, it’s conservative tuning that keeps both motors from annihilating the tires in stock trim.

  • avatar
    gaazmon

    I like the 5-speed better. Just my personal prefernce. I have the 5-speed on my car, sister has the 7-speed on hers. Driven both, like the 5 better. To each his own.

    Doctorv8, yes you are correct the supercharged engine is 5.4. The 6.2L natural V8 does have less low end shove than the 5.4 supercharged V8, but once both cars start reaching the higher rpm range, the 6.2L V8 beats the 5.4 supercharged.

    Also, I prefer the supercharged 5.4L V8 over the 6.2L natural V8.

  • avatar
    doctorv8

    gaazmon,

    Yes, clearly the blown 5.4 has more low end than the n/a 6.2. However, the author compared the 5.4 to the V12s, which have copious low end; in fact, far more than even the mighty 5.4 Kompressor, since MB hasn’t built a V12 without twin turbos since 2002.

  • avatar
    gaazmon

    Ya, the V12s are monster engines. I also remember that the V12s from 2000 to 2002 were non-turbo and had some kind of valve shut-off system where it cut the operation to 8 instead of 12, but I guess they had some really big problems maintenance wise with those engines, or so I hear from my mechanic. He also said the V12s in general had a lot more problems than the V8s and he doesn’t recommend anyone to buy them.

    But I’m really likeing the sound of these new engines especially with the numbers they are throwing at us from an engine that is a lot smaller.

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