Audi RS5 V8 vs Audi RS5 V6TT (anyone have vids?)

[fstr n u]

Has anyone come across a video link showing the acceleration difference between the outgoing V8 RS5 and new V6TT RS5?

I can't find anything online

[brilliant_black]

Has anyone come across a video link showing the acceleration difference between the outgoing V8 RS5 and new V6TT RS5?

I can't find anything online

I’m no expert so this is just my opinion.

The B8 RS5 has a dual clutch with actual launch control whereas the new B9 is just brake torque so if both cars launch I think it would be close, but the B9 will obviously pull away eventually.

Now on a roll race, the 2.9 Twin turbo engine has a huge torque advantage over the old 4.2 while still retaining the horsepower...I think the B9 would absolutely crush the B8 on a roll.

Also take into consideration the B9 is a little bit lighter than the B8, not by much though.


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[fstr n u]

I've driven both cars and the V6TT feels much faster...i'm surprised there isn't a video that i've been able to find showing how these cars would lineup. Perhaps someone on this forum is more tech/internet savvy than myself and can locate such a video.

[Don Arco]

I've driven both cars and the V6TT feels much faster...i'm surprised there isn't a video that i've been able to find showing how these cars would lineup. Perhaps someone on this forum is more tech/internet savvy than myself and can locate such a video.

I would imagine the V6TT only feels faster, and that’s more than likely due to the increased tq. 0-60 times look incredibly similar, but maybe the V6TT pulls away in the 1/4 mile? We’re also comparing a NA engine with a TT engine. I would imagine that the V8 could spit out more impressive numbers vs the V6 if one were to build out both engines to their max. Anyone have numbers on the V6TT 1/4 mile?

[AsherAudi]

Not that its apples to apples but I crushed a new S5 Sportback with my RS5 JHM Stage 2 on a rolling race from 50-100mph - granted it was only an S5 (not RS) and the heavier 4-door version. I've looked on my Dragy app and seen some actual numbers of the new RS5 and they are right in line with my own (some even slower), though my car has several key performance mods (ecu/tcu tune, cai, lightweght wheels etc). As Don says, the torque from the TT motor means these newer cars will all pull the N/A motor cars right off the bat on rolling races. Let's face it - all these cars like RS3, TTRS, M4, C63 etc are faster as a result, and can be easily tuned to stomp us, yet I still wouldn't trade my car for them

If there was no JHM stage 2 ecu/tcu, I'd probably honestly rather have one of them due to there being such a wide performance gap but now that the B8 RS5 can hang with them, I prefer the B8. W/o the tune, I'm sure the new B9 would crush a stock B8. There is a cool video on Youtube though where a guy does a full review of both and drives them back-to-back and in the end he says the new B9 is better in every way but the B8 is the one he'd choose as it's way more fun - and it's true as he literally giggles like a little girl winding it through the gears after driving the B9 version which he calls great but boring.

[BuyTheWarranty]

^^ Auto Top NL!

And yes, he drove a stock B8 RS5 with I think only a catback exhaust. The JHM stage 2 truly makes it a different, more aggressive car.

I had a B9 S5 2 door loaner last year and they *feel* faster due to the torque. My RS5 on JHM stage 1 felt slower getting back into it, really had to wind it out.

Without a doubt, the B9’s are faster and have a version of launch control. A stage 2 B9 RS5 with exhaust will smoke our cars. I’ve seen multiple drag runs of stock RS5’s running mid 11’s.

I have YET to see a B8 vs a B9 video tho.... stock for stock, the B8 will get obliterated. JHM stage 2 RS5 would be close...

[superswiss]

I’m no expert so this is just my opinion.

The B8 RS5 has a dual clutch with actual launch control whereas the new B9 is just brake torque so if both cars launch I think it would be close, but the B9 will obviously pull away eventually.

Now on a roll race, the 2.9 Twin turbo engine has a huge torque advantage over the old 4.2 while still retaining the horsepower...I think the B9 would absolutely crush the B8 on a roll.

Also take into consideration the B9 is a little bit lighter than the B8, not by much though.


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That's not quite how it works. Horsepower is a function of torque and rpm, to be specific hp = torque * rpm / 5252. What determines how fast a car accelerates is not the torque, but the horsepower. Horsepower is the rate of work that's being performed. The more work that is performed in a given time the faster the car accelerates. Weight plays a role as more power is need to move a heavier car.

Given the formula above, there are two ways to increase power. Increase torque or increase rpm. The B8 does it by increasing rpm, whereas the B9 does it by increasing torque at the low end. Higher low end torque results in the engine making more horsepower at lower rpms. The B8 actually makes slightly more horsepower at the top, so it will be faster at the top, but the slightly higher weight probably offsets it.

As far as launch control vs brake torquing is concerned, both attempt to bring the engine to peak torque for maximum take off power. The B8 needs to rev much higher to achieve that. It revs to 5000 rpm and then when the clutch drops the rpms drop to about 4000 rpm where the engine makes peak torque. The B9 brake torques to about 3000 rpm and then takes off. The rpms don't drop much because of the torque converter. So with this we can calculate how much horsepower each engine makes at launch rpm.

B8: 4000 rpm * 317 / 5252 = 241.43
B9: 3000 rpm * 443 / 5252 = 253.05

The difference is not that big, but the B9 makes more horsepower when launching and therefore has the edge, especially since it weighs slightly less and the actual launch rpms are slightly more than 4000 for B8 and slightly less than 3000 for the B9. Now, ultimately what matters is wheel torque and wheel horsepower and to calculate that you have to factor in gearing. The B8 uses more aggressive gearing, because it can rev higher. You could plot some graphs and see how they compare over the rpm range and in different gears, but I'm just explaining this, because the role of torque when it comes to acceleration is largely misunderstood and misquoted. Torque is what you feel, but horsepower is what accelerates a car and determines its top speed. The main difference is that torquier engines don't need to rev as high to make the same power as an engine with less torque.

Now for comparison, we also have to factor in altitude. A naturally aspirated engine looses much more power at altitude than the forced induction engine. It will be a very different race at sea level vs up in Denver.

[Humble]

Wow! Anyone want to argue with that? Very nice!


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[01.10]

hi,

here are two Links from youtube Germany.......have fun by looking

https://www.youtube.com/watch?v=6PPC...&index=13&t=0s

https://www.youtube.com/watch?v=U9GgC2yUU9w&t=628s

https://www.youtube.com/watch?v=w7Gw...L&index=2&t=0s