Convertible v Coupe - which is faster?

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  • เผยแพร่เมื่อ 2 ส.ค. 2024
  • I've always wondered - when you take the roof off a car, how much slower is it compared to the coupe version of the same car? To find out, we lined up a 2022 Porsche 911 Turbo (992) next to a 2022 Porsche 911 Turbo Cabriolet (992) to see exactly what the story is. The end result is me being very, very confused!
    Convertible CFD study by Serkan Solmaz: sersol.weebly.com/workshop/con...
    Let me know how you explain the science in the comments section.
    More Porsche content: www.carexpert.com.au/porsche
    More Porsche 911 content: www.carexpert.com.au/porsche/911
    Skip Ahead:
    Intro: 00:00
    The Science: 01:12
    Cab v Coupe baseline drag race: 03:22
    Cab v Coupe same weight drag race: 07:11
    Verdict: 12:44
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    #porsche #911 #dragparison
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ความคิดเห็น • 120

  • @davwatto77
    @davwatto77 2 ปีที่แล้ว +21

    Kind of envious of you Paul, it's days like these you must crave. I'd be happy to review the run of the mill cars as a job but I guess this is why you are fortunate enough to say that you get paid to do your hobby.

    • @CarExpertAus
      @CarExpertAus  2 ปีที่แล้ว +2

      Some days are better than others 😁

  • @pnevma382
    @pnevma382 2 ปีที่แล้ว +13

    You should dyno each car to take the kW/torque into consideration. I think it's either the cabrio is making a bit more power, or the tarmac at the right lane has more grip.

    • @CarExpertAus
      @CarExpertAus  2 ปีที่แล้ว +4

      Good point! Should have done that.

  • @BenjaminWangGoogle
    @BenjaminWangGoogle 2 ปีที่แล้ว +14

    Great video but just so you know, the dynamic behaviour of the vehicle under acceleration and the tendency to ‘squat’ plays a huge role in affecting the grip levels of the car. Putting your ‘ballast’ in the front of the car affects the way the vehicle squats under power - this affect RWD cars more, but still plays a role because the rear tyres are ‘loaded’ more regardless of powertrain format. Obviously there are a million other variables as well so I’m just nitpicking.

    • @CarExpertAus
      @CarExpertAus  2 ปีที่แล้ว +4

      Nitpick away! It’s a hard one to get my head around.

    • @mygoogle1482
      @mygoogle1482 2 ปีที่แล้ว

      agree - another variable is the driver and the lanes they are drive in

    • @johnrb9397
      @johnrb9397 2 ปีที่แล้ว +1

      @@mygoogle1482 guys he loaded up the coupe too much!! Do the math!! He says he weights 30kg over Steve also!!! + passenger + 20kg.

    • @lordcaptain73
      @lordcaptain73 2 ปีที่แล้ว

      That’s an excellent point, I see a reasonable excuse to have a rerun. Maybe throw in another couple of Supercars for, you know, science.

  • @BenjaminMutuku
    @BenjaminMutuku 2 ปีที่แล้ว +3

    Wonderful video topic! I’ve always been curious too! I’m loving the Porsche 911 each time I see it.

    • @CarExpertAus
      @CarExpertAus  2 ปีที่แล้ว

      It's a stunner of a car!

  • @judet8290
    @judet8290 2 ปีที่แล้ว +5

    love the different content on the channel !

  • @sebtrident
    @sebtrident 2 ปีที่แล้ว +1

    Love watching the dragparison definitely love to see more videos

  • @johnrb9397
    @johnrb9397 2 ปีที่แล้ว +3

    Lovely stuff Paul. Yes an interesting question.

  • @k_plax
    @k_plax 2 ปีที่แล้ว +3

    Brilliantly planned, executed, and presented Paul. Dyno run for both cars on the same machine on the same day would've topped it off and perhaps given us a conclusive explanation of the drag test results.

    • @CarExpertAus
      @CarExpertAus  2 ปีที่แล้ว +1

      Thanks mate! And agreed.

  • @-TJ-
    @-TJ- 2 ปีที่แล้ว +2

    I think we can all conclude the Cabriolet won because it has racing stripes down the bonnet.

  • @simoncouch1523
    @simoncouch1523 2 ปีที่แล้ว +1

    another wicked review, thank you!!

  • @alonso_ma
    @alonso_ma 2 ปีที่แล้ว +2

    Only explanation I have is that the Cabriolet has a bit more power. Can’t think of another reason to get faster trap speed and equal or slower time. In terms of aero, you were quite right in your explanation, to the best of my knowledge. Thanks for the video!

  • @mr10secondGT
    @mr10secondGT 2 ปีที่แล้ว +2

    Also, remember that the 11.1 slower time will be faster in trap speed because it accelerated for a few splits longer.

  • @MathewBT81
    @MathewBT81 2 ปีที่แล้ว +3

    This is the content I'm here for 🏆

  • @mr10secondGT
    @mr10secondGT 2 ปีที่แล้ว +5

    Porsche must be laughing at its customers. That Cab definitely makes more power. Chances are it’s Turbo S power in a Cab Turbo.

  • @CathodeRayNipplez
    @CathodeRayNipplez 2 ปีที่แล้ว +1

    Oh Paul, so sucks to be you sometimes 😆
    Makes a nice change from suffering all those lame shopping trolleys this year.
    Not envious at all. MUCH!

  • @brainsmatterpodcast
    @brainsmatterpodcast 2 ปีที่แล้ว

    Agree with some of the other commenters … the ballast weight distribution makes a difference in grip levels, and it also seems like there may have been a torque curve difference between the two cars too. Just a guess though, bee a while since I’ve done uni physics 🤔

  • @mahlatsemothogoane1512
    @mahlatsemothogoane1512 2 ปีที่แล้ว +1

    Great video.. the only explanation I can come up with...it depends where the extra weight is placed. For the cabrio. The weight is more on the rear wheels. Maybe that give it a bit for traction

    • @CarExpertAus
      @CarExpertAus  2 ปีที่แล้ว

      Very true! Thanks for watching :-)

  • @Cougarsamurai
    @Cougarsamurai 2 ปีที่แล้ว +5

    I'm so confused I'm going to cancel my order for both lol.

  • @gpb3762
    @gpb3762 2 ปีที่แล้ว +5

    2.9 s in a regular Turbo!

  • @alifkhan5806
    @alifkhan5806 ปีที่แล้ว

    It's really a detailed performance comparison between convertible and coupe

  • @ericmichel3857
    @ericmichel3857 2 ปีที่แล้ว

    Fun test! Regardless of grip or weight ballast the MPH at the end of the 1/4 mile tell the story. That story says either the cab has more HP, or the actual difference in drag is not what is advertised. As mentioned a chassis dyno test would have been enlightening, or you could line the two cars side by side at speed and then put both in neutral and see how they slow. The car with more drag will slow down faster.
    Another factor could be wheel alignment, perhaps the coupe had more toe in, something caused a lot more tire drag. Most people rarely think about wheel alignment or tire wear, but it can have a huge impact on how the tires drag rolling down the road. Zero toe front and back is ideal for acceleration, but for handling most cars have a fair amount of toe in causing the tires to drag a bit on the pavement.
    So to do this test and eliminate more variables both cars should be on new same type tires with very similar wheel alignment, chassis dyno test for power variations, and just a basic drag test from say 100 MPH to see if one car has significantly more drag for some reason. Perhaps even a faulty wheel bearing? Or some other mechanical issue?
    Great effort regardless and what this test shows is that the minor drag and weight differences between a coupe and convertible are negligible compared to many other variables. I have seen several coupe and convertible acceleration tests on high powered cars like these, and they are virtually identical. It is only on low powered cars where the slight differences in weight and drag seem to make a noticeable difference. Perhaps you can try this again sometime with a couple of MX5's with autos.

  • @gavinwilkie3544
    @gavinwilkie3544 2 ปีที่แล้ว

    Great video Paul - any response/explanation from Porsche Australia?

  • @chronomatica
    @chronomatica 2 ปีที่แล้ว +1

    I have a 997 Cabrio Carrera stick shift. It is very fun in Florida. this is great video I think the convertible is the way to go. Porsche designed the 997 as a Cabrio and added a roof. they did not cut the roof or modify the structure I am sure they are still doing the same. Unlike other cars that do not take the same approach in their convertibles.

  • @joshung007
    @joshung007 2 ปีที่แล้ว +1

    Can u pls test different suspension set-ups (eg. air suspension, etc.) and what is involved in "local tuning" for Australia?

  • @bretter4368
    @bretter4368 2 ปีที่แล้ว +3

    Would like an explanatory video of the workings of radar cruise control. Got it on my beemer and now the rear brakes are worn apparently with 50k on the clock. Fronts are fine despite doing most of the work. Does radar use rears to adjust speed? Enjoyed the 911 video too!

    • @CarExpertAus
      @CarExpertAus  2 ปีที่แล้ว +1

      Interesting! Did they say it was the cruise causing the issue?

    • @bretter4368
      @bretter4368 2 ปีที่แล้ว

      No, at this point it's just a screen message with continual warnings that replacement is required. I thought a radar system would reduce power to slow the car, but now I'm not sure. To be honest, I don't have a lot of faith in the dealer or their ability to answer a technical question.

  • @deganellis
    @deganellis 2 ปีที่แล้ว

    Was that Steve Pizzati in the cab?
    Miss that guy! He'd be great in CarExpert vids. Head to head with atko!

  • @Official.tadiwa
    @Official.tadiwa 2 ปีที่แล้ว +1

    Bet isnt a word guys hahaha, its he beat us. Past & present tense :)

  • @briantye110
    @briantye110 2 ปีที่แล้ว +2

    The difference is if they weighed the same Porsche would not distribute the weight in those areas in that manner. it would be factored in for launch and performance ?

    • @CarExpertAus
      @CarExpertAus  2 ปีที่แล้ว

      The weight distribution would be different given the roof, but once they launch and have traction it shouldn’t make too much of a difference.

  • @Malc664
    @Malc664 2 ปีที่แล้ว +1

    The lucky owner of the white cabriolet got a good motor. The coupe needs an ECU remap tune to keep up.

  • @vuyaniman9440
    @vuyaniman9440 2 ปีที่แล้ว

    Maybe the cabriolet is much more stiffer and is then able to put more of its power down in order to negate any disadvantage from not having roof.

  • @richieduck67
    @richieduck67 2 ปีที่แล้ว +2

    Nice one Paul can you do it with a Christmas tree as well?

    • @CarExpertAus
      @CarExpertAus  2 ปีที่แล้ว

      Ha ha, good question!

    • @bradhawk3658
      @bradhawk3658 2 ปีที่แล้ว +1

      I imagined the cabriolet with its roof down and a Christmas Tree in the passenger seat! 🤣

  • @Foxtrot1967
    @Foxtrot1967 7 หลายเดือนก่อน

    I think they both are wonder cars and fast enough!

  • @richieduck67
    @richieduck67 2 ปีที่แล้ว +1

    Which one are you taking home for the weekend?

    • @CarExpertAus
      @CarExpertAus  2 ปีที่แล้ว +1

      Ha ha yes the coupe stayed with us for a few week as we hit lockdowns! This was filmed a while back.

  • @mosca3289
    @mosca3289 2 ปีที่แล้ว +2

    Obviously, stripes make more difference than the red colour.

  • @samiali594
    @samiali594 2 ปีที่แล้ว

    Every time I see thumbnail of thia video I feel like Paul is doing a Punjabi dance.👻

  • @daljitsinghdhillon682
    @daljitsinghdhillon682 2 ปีที่แล้ว +2

    Hi Paul,I Don’t know what is the theory behind it but the way you describe things it’s cool.Good luck carry on brother…….

  • @williampresley3000
    @williampresley3000 2 ปีที่แล้ว

    Seems the Cab has a few extra horsepressures.

  • @malsmith2012
    @malsmith2012 2 ปีที่แล้ว

    Side of the track matters mate. Higher terminal speed proves that wheel spin was an issue.. Just like at the drags you turn the tyre a little it gets you in to top a tad earlier bringing a slightly higher terminal speed but ET is down..

    • @CarExpertAus
      @CarExpertAus  2 ปีที่แล้ว +1

      Yep agreed. We ruled that out when we switched sides, though. Also there’s only wheel spin off the line, once they were both moving they had traction for the rest of the run.

  • @user-jf8gd3lv7q
    @user-jf8gd3lv7q 2 ปีที่แล้ว

    Of course the double stripes make the Cabriolet faster! 😁

  • @GTO11400
    @GTO11400 2 ปีที่แล้ว

    Can we see a drag race between the regular 911 turbo and the 911 turbo s we want to see the difference.

  • @HiddenWen
    @HiddenWen 2 ปีที่แล้ว

    The Turbo S is such a complete package, and you can't go wrong with either the Cab or the Coupe. The only real downside of the Cab is it looks worse than the Coupe. But it provides more top-off fun!

  • @johnrb9397
    @johnrb9397 2 ปีที่แล้ว +3

    Cab for the win! Wait that guy weighs 40kg? 60kg diff -20kg in the front?

    • @CarExpertAus
      @CarExpertAus  2 ปีที่แล้ว

      There was also a weight difference between Steve and I of about 20-30kg (Steve exercises 😅).

    • @johnrb9397
      @johnrb9397 2 ปีที่แล้ว +1

      @@CarExpertAus if cab was 60kg heavier steve 20kg lighter the coupe would only be 40kg heavier. Add your passenger 60kg and 20kg in the front, I believe you loaded up the coupe 40kg over the cab. This may explain the result!!!!!!!

    • @CarExpertAus
      @CarExpertAus  2 ปีที่แล้ว

      @@johnrb9397 Yes - you’re right! But that’s the weight difference on paper. I didn’t mention in the the video (but should have) that the cars had different options fitted to them and different fuel loads. So the exact numbers (which I had on paper somewhere, I promise!) matched up. We didn’t have enough weight to add to the front so we went with James in the coupe plus the weights to get it there.
      Sorry to complicate things!

  • @vuyaniman9440
    @vuyaniman9440 2 ปีที่แล้ว

    I’d like to see Tiguan 162kw vs GTI , even though GTI has more power and less weight compared to Tiguan. Their 0-100km times (claimed) are just 0,1 seconds apart (6,4 to the Golf and 6,5 to the Tiguan)

  • @spoon0418
    @spoon0418 2 ปีที่แล้ว +1

    Cab has a stiffer chassis which could translate in a difference

  • @robstone4537
    @robstone4537 2 ปีที่แล้ว

    Factory quoted power figures are always averages. You will get some motors above that and some below. Maybe the cabrio was a really good one or maybe the Turbo was a bit below average.

  • @simmosideways
    @simmosideways 2 ปีที่แล้ว +1

    Science!

  • @shahg25
    @shahg25 2 ปีที่แล้ว

    Weight distribution mate, with the convertible roof system the cab had more weight on the rear side. Which helped it go faster imo

    • @CarExpertAus
      @CarExpertAus  2 ปีที่แล้ว +1

      Hmm, shouldn’t make that much of a difference once the car is moving given they both have traction after taking off.

    • @rdmz135
      @rdmz135 2 ปีที่แล้ว

      But it kept on pulling the after the launch

  • @eshanmirash2456
    @eshanmirash2456 2 ปีที่แล้ว +1

    Hold up, is “Steve” Steve Pizzati?

  • @anilmahabirsingh422
    @anilmahabirsingh422 2 ปีที่แล้ว +1

    Were the diff ratios the same ... if they were different it might explain the discrepancy

    • @CarExpertAus
      @CarExpertAus  2 ปีที่แล้ว +1

      Good question. I’d assume they’re identical given they’d just slot the engine and gearbox in on the same production line.

    • @anilmahabirsingh422
      @anilmahabirsingh422 2 ปีที่แล้ว

      @@CarExpertAus just to let you know I am watching this video from the other side of the world ... the Caribbean ... Trinidad and Tobago to be exact

  • @Nerdificationing
    @Nerdificationing 2 ปีที่แล้ว

    Why not switch drivers...?

  • @stuartsmith5308
    @stuartsmith5308 2 ปีที่แล้ว +2

    Please test identical sports cars. One with carbon fibre and one with not. I think carbon fibre cost alot of money and makes no difference, i might be wrong ? lets see

  • @fale892
    @fale892 2 ปีที่แล้ว +2

    2022 Hyundai i30 N hatch (auto) v Hyundai i30N sedan (auto).

  • @1NG_
    @1NG_ 2 ปีที่แล้ว

    Maybe it was also down to driver abilities. You should have tried swapping cars and redoing all the tests

    • @CarExpertAus
      @CarExpertAus  2 ปีที่แล้ว +1

      Yeah we mentioned that in the video. It’s launch control so pretty much just foot on the throttle so it shouldn’t make any difference.

  • @Nikolasmar
    @Nikolasmar 2 ปีที่แล้ว

    You should change cars to see if its the driver of the cabrio faster

  • @vrmaxgameon9478
    @vrmaxgameon9478 2 ปีที่แล้ว +1

    Can you do a review of Hyundai palisade 2022 it is dam 👍

  • @rdmz135
    @rdmz135 2 ปีที่แล้ว +1

    Cabrio 100% makes more power. I guess the final test should be the dyno.

  • @aliibn-muhammadal-sharif8568
    @aliibn-muhammadal-sharif8568 2 ปีที่แล้ว

    It’s a Porsche! It wasn’t designed to make sense. It was created to defy all rationale.

  • @sd30001
    @sd30001 2 ปีที่แล้ว

    Why didn't the drivers swap cars too? With such a small variation couldn't that be a factor?

  • @MrThePraye
    @MrThePraye 2 ปีที่แล้ว

    It’s not the car , it’s the driver!
    You should have tried swapping drivers and doing the tests again.

  • @001barca
    @001barca 2 ปีที่แล้ว

    The coupe is running on the wet side of the track, try changing drivers and track sides. You'll see the coupe is faster

  • @RK-hy6ye
    @RK-hy6ye 2 ปีที่แล้ว +1

    Yea I agree please follow up with a dyno. Imagine buying the non cabrio coz u thinks it’s faster nekkminit u watch this video.

    • @CarExpertAus
      @CarExpertAus  2 ปีที่แล้ว +1

      Yep we definitely should have done a dyno run!

  • @graham2342
    @graham2342 2 ปีที่แล้ว +2

    I think because Steve was counting, it gave have about .2 os second head start,.

    • @CarExpertAus
      @CarExpertAus  2 ปีที่แล้ว

      Potentially - but they were independently timed so it wouldn’t make a difference.

    • @graham2342
      @graham2342 2 ปีที่แล้ว +1

      @@CarExpertAus who was holding the timer?

    • @CarExpertAus
      @CarExpertAus  2 ปีที่แล้ว

      @@graham2342 It’s a VBox. It’s GPS timing equipment. Each car was running one each.

    • @graham2342
      @graham2342 2 ปีที่แล้ว

      @@CarExpertAus thank you car expert. All appears to be in order.

  • @tobybrowne7906
    @tobybrowne7906 2 ปีที่แล้ว +1

    You look like your not used to this level of car, is it faster than your Tesla?

    • @CarExpertAus
      @CarExpertAus  2 ปีที่แล้ว +1

      Yes - slightly quicker. But that’s just 0-100 - from 100km/h it destroys my Tesla. The mid range is just crazy.

  • @Ballantrae
    @Ballantrae 2 ปีที่แล้ว

    Change drivers…

  • @pigeonpoo1823
    @pigeonpoo1823 2 ปีที่แล้ว

    The Germans do have form when it comes to lying
    VW and dieselgate (and maybe the whole 1930s thang)