• Mar 5, 2009
Dodge Viper ACR - Click above for high-res gallery

The battle between America's preeminent supercars continues as Inside Line has taken a stock Dodge Viper ACR to the Bonneville Salt Flats to see what it can do. We'd say it did rather well. On the final run of the day, Dodge's ultimate Viper slithered its way to 173 miles per hour on the 10-mile long strip of salt. There's a great story about what it took to reach that terminal velocity, click here to read it.

By way of comparison – and because we know you're all wondering – Top Gear's Jeremy Clarkson was able to wring a stock Corvette ZR1's neck to about 176 miles per hour at Bonneville in an episode that aired late last year. Different days with different weather conditions to be sure (update: as pointed out in the comments, the ZR1's figure was achieved with just 1 mile of runway), but it's always fun to stir the pot, right?

It's not just in straight-line acceleration where the two American heavyweights duke it out, with the Viper ACR recording a blistering lap of the Nurburgring in just 7:22.1, which compares rather favorably to the ZR1's 7:26. Strapped to the dyno, the Viper ACR puts down a whopping 546 horsepower and 510 lb-ft of torque compared to the supercharged ZR1's 549.9 horsepower and 500 lb-ft. Now, when does round 4 begin?



[Source: Inside Line]


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    • 1 Second Ago
  • 37 Comments
      • 5 Years Ago
      Someone needs to take the Ford GT out there.
        • 5 Years Ago
        I imagine the Bugatti would do very well on the standing mile simply because of its 4 wheel drive. Hell I bet an RS6 could come dangerously close
        • 5 Years Ago
        "I imagine the Bugatti would do very well on the standing mile simply because of its 4 wheel drive. Hell I bet an RS6 could come dangerously close"

        It would be fun to see how much the 4WD would help.
        I am sure it would be useful for the first several miles!
        • 5 Years Ago
        Coming from someone who has driven FGT and many vipers, the FGT will get its ass handed to it by the ACR on the road course. Same goes for the ZR1. The viper and vette are not comparable. The vette is the poor mans sports car. The viper is the poor mans race car. The vette is not an exotic. The viper is. The Vette front was clearly ripped off from the styling of the viper. If you want to argue STFU and realize Bob Lutz, guy from the viper program, went to GM and did the Z06 program and had a hand in the design of the C6. The C6 came long after the SRT-10 so there is no way the viper copied it. Blah blah blah stirring the pot
        • 5 Years Ago
        Someone needs to take a Bugatti Veyron out there.
      • 5 Years Ago
      The Viper is such a beast. I'd love to have one.
        • 5 Years Ago
        I would too. It would make for an insane track car.

        I saw an ACR Viper here in Dallas and it looks like it doesn't belong on the street with that massive wing.
      • 5 Years Ago
      I just don't think Vipers look like modern day supercars... it's 2009, but this car looks like a car from over a decade ago
      • 5 Years Ago
      This is why I love the Inside line website, its full of hidden gems(this articles was actually released a couple months ago) and unlike most review websites, their articles come from a consumers point of view, not from some journalist whom thinks he is almighty.

      BEST CAR WEBSITE EVER...after autoblog
      • 5 Years Ago
      anyone care to tell why it has 6 bolt hubs? i just noticed this
        • 5 Years Ago
        Vipers have always had six bolt hubs, it comes with having a rear that is made for truck duty. In fact, both the Viper and the Wrangler Rubicon both use a variation of the Dana 44.
        • 5 Years Ago
        damn i never knew that, thanks
      • 5 Years Ago
      I wonder how this compares to a Prius.
      • 5 Years Ago
      Not bad for a car designed to corner!
      • 5 Years Ago
      The aero parts that make the ACR king of the ring have the opposite effect in straight line performance. The regular Viper would exceed the ACR easy in top end speed.

      • 5 Years Ago
      This is why I want ALL the automakers to survive. Nothing beats healthy competition and bench racing!
      • 5 Years Ago
      Minor corrections: The ZR1's salt time was over the standing mile, IIRC. Also the 'ring time was 7:22.4, not 7:26.
        • 5 Years Ago
        Bucket,

        You are supposed to be able to do your own homework and occasionally use deductive reasoning.

        Autoblog doesn't believe the claim anymore either. They did their homework, though after the fact.
        • 5 Years Ago
        So I'm not supposed to believe Autoblog, but I AM supposed to believe some guy named "gp900bj" who posts on Autoblog.
        • 5 Years Ago
        The Viper is also obviously wearing Michelin Pilot Sport Cups there, some of the fastest dry weather tyres there are. What does the 'vette run?

        Jon
        http://www.tyrereviews.co.uk
        • 5 Years Ago
        Hate to say it John but Autoblog does not constitute a reliable source of information. Blog's are not strictly run or maintained by industry professionals or journalists.

        Really anybody can blog, including you and me and we can pretty much report any damned thing we like. You can go back to the article and you'll notice that not a single reference or citation is made to any kind of source for the 7:22.4 claim. Mr. Harley simply thanked some unidentified punter named "Xeyad" for tipping him about the rumor.

        It's actually a fairly poor example of Journalism.

        The whole 7:22.4 debarcle was started by some unidentified, crafty bandit who posted the supposed lap details on fasteslaps(dot)com and then proceeded to hot link the fraudulent lap details onto several automotive forum threads. By the time fastestlaps realised the lap time was a fraud and removed it (and it's still removed) it had already spread around the world.

        Bloggers then went on to do what they do best, reporting the unsupported rumor without ever fact checking it. Turns out that GM has never at any time issued any press release claiming to have run a 7:22.4 lap. At least one magazine editor confirmed that GM has not even been back to the Nurburgring with the ZR1, since setting the 7:26.4 lap.
        • 5 Years Ago
        @Bucket

        I don't normally give research lessons but let me help you out.

        Read the following two Autoblog posts, first one reporting the 7:26 lap time and the second reporting the 7:22 lap time, notice the difference in the reporting language between the two and specifically the lack of reference to anybody in the second:

        First the 7:26.4 lap time:

        "Tadge J. Juechter, Corvette's chief engineer, announced this morning that Jim Mero, GM's development engineer, drove the ZR1 around the Nurburgring in 7:26.4. According to the GMNext blog, the run took place earlier this morning and that conditions were good on the track, with the exception of a strong headwind down the main straight. Mero mentioned that he felt there were a few places where he could have gone faster, although no details were provided about why and where."

        The Source for this article is cited as the GMNext website, GM's own blog which printed a full page article written by the corvette's chief engineer himself.


        and now the 7:22 lap time:

        "Back at the Nürburgring, the hot Chevrolet Corvette ZR-1 has just ripped four seconds off its claimed 7:26 lap. The new time, with Jan Magnussen at the wheel, is a claimed 7:22.4 for the full 12.93-mile loop. While the number is pretty bloody fast, it is still .3 seconds off the time earned by the Dodge Viper ACR (ouch, those three tenths really have to hurt!)."

        The source for this article is cited as the Motorgears blog which, as it turns out, is using our beloved phantom fastestlaps.com submission as their source.

        Don't you believe that something is amiss here? Go back and check for yourself if you don't believe me.
        • 5 Years Ago
        I can find an autoblog post about the 7:22.4 but no retraction. I can't find any claim it's a hoax on autoblog or anywhere else.
      • 5 Years Ago
      the 122.4 time for the zr1 is uncomfirmed...if they had a real professional drver tho i bet the time would be better....also im pretty sure the HP for the zr1 is around 638.....dunno where they got this 549 from....maybe talkin about rear wheel horses
      • 5 Years Ago
      Agree with "Craig" on this one, the drag caused by the front splitter and huge wing slowed this car way down. But I bet they created tons of down force.
      Given the same aero as regular Viper this would break 200 easy.
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