Convertible v Coupe - which is faster?
Vložit
- čas přidán 21. 07. 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
We review every new car on the market, bust car myths, cover the latest car tech and answer your burning questions.
Whether you need new car advice, purchase validation or simply love learning more about new cars and technology, we are your car experts.
Subscribe to Car Expert: / @carexpertaus
You'll find us dropping new video content three times a week. If you'd like to ask a question about one of our videos, simply leave us a comment. If you'd like to give us any feedback on our content, feel free to email us, or alternatively, hit us up on social media.
Finally, we want this channel to grow with your support and feedback. If there's anything you don't like or would like to see us change, we'd love to hear from you!
Follow us on social media to see what we're up to and to ask any questions!
CarExpert:
Facebook: / carexpertaus
Twitter: / carexpertaus
Instagram: / carexpert.com.au
Paul Maric:
Facebook: / paulmaric
Twitter: / paulmaric
Instagram: / paulmaric
#porsche #911 #dragparison - Auta a dopravní prostředky
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.
Some days are better than others 😁
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.
Good point! Should have done that.
Wonderful video topic! I’ve always been curious too! I’m loving the Porsche 911 each time I see it.
It's a stunner of a car!
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.
Nitpick away! It’s a hard one to get my head around.
agree - another variable is the driver and the lanes they are drive in
@@mygoogle1482 guys he loaded up the coupe too much!! Do the math!! He says he weights 30kg over Steve also!!! + passenger + 20kg.
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.
love the different content on the channel !
Thanks!
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.
Thanks mate! And agreed.
Love watching the dragparison definitely love to see more videos
Thanks!
Lovely stuff Paul. Yes an interesting question.
another wicked review, thank you!!
Thanks for watching!
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!
Thanks for watching!
I think we can all conclude the Cabriolet won because it has racing stripes down the bonnet.
Can u pls test different suspension set-ups (eg. air suspension, etc.) and what is involved in "local tuning" for Australia?
Good thinking!
Also, remember that the 11.1 slower time will be faster in trap speed because it accelerated for a few splits longer.
Great video Paul - any response/explanation from Porsche Australia?
This is the content I'm here for 🏆
Thanks for watching!
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.
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 🤔
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!
Interesting! Did they say it was the cruise causing the issue?
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.
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
Very true! Thanks for watching :-)
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!
😅
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 ?
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.
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.
Thanks for watching!
Was that Steve Pizzati in the cab?
Miss that guy! He'd be great in CarExpert vids. Head to head with atko!
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.
Porsche must be laughing at its customers. That Cab definitely makes more power. Chances are it’s Turbo S power in a Cab Turbo.
Could be!
Which one are you taking home for the weekend?
Ha ha yes the coupe stayed with us for a few week as we hit lockdowns! This was filmed a while back.
It's really a detailed performance comparison between convertible and coupe
I'm so confused I'm going to cancel my order for both lol.
😅😅
The lucky owner of the white cabriolet got a good motor. The coupe needs an ECU remap tune to keep up.
😅 definitely!
2.9 s in a regular Turbo!
It's quick!
Nice one Paul can you do it with a Christmas tree as well?
Ha ha, good question!
I imagined the cabriolet with its roof down and a Christmas Tree in the passenger seat! 🤣
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..
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.
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)
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.
Were the diff ratios the same ... if they were different it might explain the discrepancy
Good question. I’d assume they’re identical given they’d just slot the engine and gearbox in on the same production line.
@@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
Bet isnt a word guys hahaha, its he beat us. Past & present tense :)
You're right!
Can we see a drag race between the regular 911 turbo and the 911 turbo s we want to see the difference.
Why not switch drivers...?
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…….
Thanks mate!
Of course the double stripes make the Cabriolet faster! 😁
Cab for the win! Wait that guy weighs 40kg? 60kg diff -20kg in the front?
There was also a weight difference between Steve and I of about 20-30kg (Steve exercises 😅).
@@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!!!!!!!
@@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!
Cab has a stiffer chassis which could translate in a difference
Potentially!
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!
Obviously, stripes make more difference than the red colour.
True!
I think they both are wonder cars and fast enough!
Why didn't the drivers swap cars too? With such a small variation couldn't that be a factor?
Seems the Cab has a few extra horsepressures.
Every time I see thumbnail of thia video I feel like Paul is doing a Punjabi dance.👻
Weight distribution mate, with the convertible roof system the cab had more weight on the rear side. Which helped it go faster imo
Hmm, shouldn’t make that much of a difference once the car is moving given they both have traction after taking off.
But it kept on pulling the after the launch
It’s a Porsche! It wasn’t designed to make sense. It was created to defy all rationale.
Maybe it was also down to driver abilities. You should have tried swapping cars and redoing all the tests
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.
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
Good idea!
Hold up, is “Steve” Steve Pizzati?
🤭
Science!
Fun science :-D
Can you do a review of Hyundai palisade 2022 it is dam 👍
Yep will try and get our hands on one!
Nice
The coupe is running on the wet side of the track, try changing drivers and track sides. You'll see the coupe is faster
You should change cars to see if its the driver of the cabrio faster
2022 Hyundai i30 N hatch (auto) v Hyundai i30N sedan (auto).
Good thinking!
Cabrio 100% makes more power. I guess the final test should be the dyno.
Yes agreed!
It’s not the car , it’s the driver!
You should have tried swapping drivers and doing the tests again.
Why?
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.
Yep we definitely should have done a dyno run!
I think because Steve was counting, it gave have about .2 os second head start,.
Potentially - but they were independently timed so it wouldn’t make a difference.
@@CarExpertAus who was holding the timer?
@@graham2342 It’s a VBox. It’s GPS timing equipment. Each car was running one each.
@@CarExpertAus thank you car expert. All appears to be in order.
You look like your not used to this level of car, is it faster than your Tesla?
Yes - slightly quicker. But that’s just 0-100 - from 100km/h it destroys my Tesla. The mid range is just crazy.
Change drivers…
The Germans do have form when it comes to lying
VW and dieselgate (and maybe the whole 1930s thang)