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Torque vs.Horsepower

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Old 05-31-2014, 12:15 AM   #1
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Default Torque vs.Horsepower

I've read quite a bit about the 450 ft/ lbs of torque available in the TDI Q5s, and how for the first 30 mph, they can't be beat. My SQ5 is now approaching the 1000 mile mark, so I've been letting the reigns loose a little more lately, and what I find almost breathtaking (apologies for the drama) is the almost constant, rapid acceleration through the gears. To be honest, this is not the type of car I expect to be a beast out of the hole, smoking tires and wreaking havoc on the neighborhood, but somehow the plain quickness of this car has really got me hooked.
Mileage...I just came out of a bad relationship with a Jeep Grand Cherokee with a 5.7 hemi that I tried to mod to the best of my ability to get some speed out of...and all I accomplished was a 6.75 0-60 time and 9.5 MPG, so, I am very very happy with the 14 mpg so far.
Any discussions?

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Old 05-31-2014, 06:27 AM   #2
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It's definitely quick... and there's something about the way it's quick that's really satisfying. I can't speak to the TDI, only the TFSI, but driving the car, it really feels like you have all the power you need and the ability to get it on the road effectively. Makes daily driving, dealing with traffic, on-ramps, cross streets a different experience.

It's a fun topic to watch people get torqued about (pun unintended but tolerated) -- a new review cites a 4.8 sec 0-60 time.


I have no idea if it does 4.8 vs. 5.8, but it's a lot faster (and jarring) than the 2012 Jetta GLI I had last. That car supposedly does 5.8, but the SQ is very different experience. Plus it keeps going very hard way past 60.

Now, the first time I went to the gas station after having driven not so many miles... oh well, no such thing as a free lunch. That's where I'd be pretty interested in the TDI version.
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Old 05-31-2014, 07:51 AM   #3
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Torque is very important in speeding up, it is best shown by the following:

SQ5 3.0TFSI 354PS / 470Nm 0-100 km/h - 5,3 s
SQ5 3.0TDI 313PS / 650Nm 0-100 km/h - 5,1 s


TDI has 41PS less but has better acceleration
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Old 05-31-2014, 08:20 AM   #4
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Quote:
Originally Posted by spijun View Post
Torque is very important in speeding up, it is best shown by the following:
SQ TDI 313HP 0-100km/h - 5,1s
SQ TFSI 354HP 0-100km/h - 5,3

TDI has 41HP less but has better acceleration
True. What's interesting is the SQ5 TDI is an exceptionally high HP diesel...kind of rare. Having 73HP more than the regular TDI (6.5s) and 125lb-ft more torque than the TFSI SQ5. So no real surprise it is quick. No idea what the gearing is on SQ5 TDI either.
The regular 3.0T Q5 has only 30 more HP than the regular TDI and despite the TDI's 133 lb-ft advantage it is 0.5s slower to 60. I thought the consensus was the TDI's biggest wow factor other than fantastic mileage is the 60-80MPH+ acceleration.
At any rate both are quick...Audi loves torque...and so do I.
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Old 05-31-2014, 08:25 AM   #5
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In recent tests, Car & Driver reported:

SQ5: 5.2 0-60 mph and 13.1 0-100 mph
TDI: 5.8 0-60 mph and 17.6 0-100 mph

This is just one publication's reviews, others will vary.
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Old 05-31-2014, 08:50 AM   #6
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Quote:
Originally Posted by gk1 View Post
True. What's interesting is the SQ5 TDI is an exceptionally high HP diesel...kind of rare. Having 73HP more than the regular TDI (6.5s) and 125lb-ft more torque than the TFSI SQ5. So no real surprise it is quick. No idea what the gearing is on SQ5 TDI either.
The regular 3.0T Q5 has only 30 more HP than the regular TDI and despite the TDI's 133 lb-ft advantage it is 0.5s slower to 60. I thought the consensus was the TDI's biggest wow factor other than fantastic mileage is the 60-80MPH+ acceleration.
At any rate both are quick...Audi loves torque...and so do I.
New a monster TDI 385 PS (283 kW) and 750 Nm coming soon
http://ecomento.com/2014/05/28/audi-...mance-diesels/
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http://www.caradvice.com.au/288497/a...esel-rs-model/
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Old 05-31-2014, 12:13 PM   #7
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I find that a high torque engine feels like a more "relaxed" drive; from the standpoint that there are lower shift points and very little "drama". It feels effortless.
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Old 05-31-2014, 01:05 PM   #8
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Quote:
Originally Posted by Q5 Bob View Post
In recent tests, Car & Driver reported:

SQ5: 5.2 0-60 mph and 13.1 0-100 mph
TDI: 5.8 0-60 mph and 17.6 0-100 mph

This is just one publication's reviews, others will vary.
They were testing standard TDI, not SQ available only in EU
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Old 05-31-2014, 07:56 PM   #9
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I really enjoyed the TDI torque matched to the 8 speed on the autobahns during our recent ED. It was nice for the engine to be loaping around 2700 rpm at 120 mph. Amazing when downshifting to get into the fast lane without the hectic drive for rpm. Quite a nice power train combination.
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Old 05-31-2014, 09:39 PM   #10
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Quote:
Originally Posted by Q5 Bob View Post
In recent tests, Car & Driver reported:

TDI: 17.6 0-100 mph
OMG! This is slow...
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Old 06-01-2014, 04:03 AM   #11
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Still 2 seconds quicker than a 2.0T according to the same publication.
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Old 06-01-2014, 04:05 AM   #12
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The Biturbo SQ5 TDI is insane.. Brutal power, and has no problem finding 155mph. none. Very very fast.
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Old 06-01-2014, 04:06 AM   #13
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I agree. I prefer the subdued engine tone, the completely effortless acceleration. No fuss, no drama, just power.
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Old 06-01-2014, 04:54 AM   #14
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Quote:
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I agree. I prefer the subdued engine tone, the completely effortless acceleration. No fuss, no drama, just power.
same here. and all that torque is available from such a low rpm which is where the tach usually is. The gas engines need to be higher in the revs and yes they pull hard but at the same time your fuel economy falls off where as the diesel maintains it.

Put it this way, horespower is how fast you hit the wall, torque is how far you move the wall.
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Old 06-01-2014, 05:04 AM   #15
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Funny story - I swapped out of an A7 TDI into an S7, and on pulling onto the road, my first reaction was, "where's the torque?"... Even that wonderful twin turbo 4.0 V8 engine needs more revs to make torque, and even then, it's not as much as the TDI makes.

Then again, once you clear 4k in the S7, you better be holding on tight. =)
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Old 06-01-2014, 09:18 AM   #16
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0-60 MPH times are kind of useless if comparing overall speed of a TDI vs TFSI. 1/4 mile times and trap speeds tell more of the story. I like torque, but torque just FEELS fast while horsepower IS fast. At 4-6k RPMS in the TFSI SQ5, that's where you know you've got horsepower. The TDI certainly gets much much better fuel economy though.
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Old 06-01-2014, 09:54 AM   #17
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Quote:
Originally Posted by Kris Hansen View Post
Funny story - I swapped out of an A7 TDI into an S7, and on pulling onto the road, my first reaction was, "where's the torque?"... Even that wonderful twin turbo 4.0 V8 engine needs more revs to make torque, and even then, it's not as much as the TDI makes.
Get back to us after you chip the S7
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Old 06-01-2014, 05:25 PM   #18
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TQ is for effortless power, HP wins races. You do all know that HP = TQ * RPM / 5252....right? Therefore, HP is nothing more than high RPM TQ.
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Old 06-01-2014, 09:57 PM   #19
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Default Example of torque

Torque: Long ago, I woke up with a morning "woodie" and had to **** very badly. I stood in front of the toilet and tried to push it down, but I was ninteen years old and that thing just did not want to go back down. Finally, I pushed down so hard on it that my feet flew out from under me and I fell, face first, into the toilet. I pretty much have understood what torque is since that morning long ago.
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Old 06-01-2014, 09:57 PM
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