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F12 / F13 (2012 - Current)
The all new 3rd generation 6 series coupe (F13) and convertible (F12) forum. The F06 BMW 6 Series Gran Coupe forum is here

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  #1  
Old 07-20-2012, 09:48 AM
gehmjc21 gehmjc21 is offline
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650i xdrive V 640d

This afternoon my wife and I drove from Florence to Nice. I was a few cars behind what looked to be a gran coupe for a while until I had a chance to pass the car. Turned out to be a 640d coupe, none m sport. It didn't look very aggressive from the rear so hence my confusion.
Anyways, I passed him doing 110ish (mph) and then the fun started. We ended up driving 60+ miles together (with a late addition of a 320d) through the Mediterranean coast anywheres from 85-125mph. Fun fun

Here's my issue....we hit a straight away. I was in sport mode. 4-5 car lengths in front of the 640 and I punched it (without using paddle shifters). I did NOT pull away quite like I would have imagined. We started at 75mph and floored it to about 125mph. I would say I gained 1-2 car lengths over that time.
Could he have been paddle shifting?
I'll be honest I thought I would have pulled much further away.
Either way it was a blast. We pulled into the toll booth and he was ahead of me and pulled away. I gunned is past him one last time. The m sport v8 growl made me smile.
So in closing, off the line I think the 650 was noticeably quicker. High speeds, seemed similar.
Sorry for the crappy review, I'm on my iPhone. I'll plug in my comp later!

Ps. Had a brand new Porsche Carrera (basic model) pass me on the way over today. He gunned it on a straight away and couldn't pull away from me! Hit 138 and it seemed like both cars had so much more. Of course then my wife yelled!

Cheers.
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Last edited by gehmjc21; 07-20-2012 at 10:09 AM.
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  #2  
Old 07-20-2012, 10:44 AM
SAMLAMBO SAMLAMBO is offline
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If you'd ask me, what gets the car moving is torque. The 640d has 630nm of torque and if I'm not mistaken the 650i has around 600nm of torque. You'd start pulling away if you were on the autobahn. I can't think of anything else if you'll were both pushing equally as hard.
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  #3  
Old 07-20-2012, 04:41 PM
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southern6er22 southern6er22 is offline
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That sounds like so much fun! All I had the chance to pull away from today was a Dodge minivan. Not very impressive since a Prius could've taken it

Nevertheless, have fun and keep making us proud!
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  #4  
Old 07-21-2012, 02:46 AM
gehmjc21 gehmjc21 is offline
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Quote:
Originally Posted by southern6er22 View Post
That sounds like so much fun! All I had the chance to pull away from today was a Dodge minivan. Not very impressive since a Prius could've taken it

Nevertheless, have fun and keep making us proud!
Thanks southern. It's been a blast. But stressful at times. We dropped her off this morning to be shipped home.
I'm going to write a review of the trip next week and add pics.
I must say I miss my own bed but not the us highways
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  #5  
Old 07-21-2012, 06:55 AM
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southern6er22 southern6er22 is offline
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Originally Posted by gehmjc21 View Post
Thanks southern. It's been a blast. But stressful at times. We dropped her off this morning to be shipped home.
I'm going to write a review of the trip next week and add pics.
I must say I miss my own bed but not the us highways
Are you doing PCD when you get back, or are you just picking it up from your dealership? Either way, I'm sure it was hard to say good bye. I had trouble getting out of my car, let alone letting it out of my site, for the first couple weeks I had it... Hell, I still have trouble with that
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  #6  
Old 07-21-2012, 09:34 AM
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xDrive McGee xDrive McGee is offline
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If he got the jump on you, even by a few moments, it definitely would've helped him keep up, though the car is no slouch either way. I imagine paddle shifting could help a bit too, provided he is getting into the right gear a smidge sooner than you.
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  #7  
Old 07-21-2012, 12:58 PM
gehmjc21 gehmjc21 is offline
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Quote:
Originally Posted by southern6er22 View Post
Are you doing PCD when you get back, or are you just picking it up from your dealership? Either way, I'm sure it was hard to say good bye. I had trouble getting out of my car, let alone letting it out of my site, for the first couple weeks I had it... Hell, I still have trouble with that


No PCD, just regular pick up. It does give me something to look forward to. But tough none the less!

Xdrive - this may be a stupid question, but why do diesel cars produce more torque? I never quite understood that. Either way I'm just realizing torque is what you need on the highway to go? BHP, of the line?
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Old 07-21-2012, 02:25 PM
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xDrive McGee xDrive McGee is offline
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Quote:
Originally Posted by gehmjc21 View Post
No PCD, just regular pick up. It does give me something to look forward to. But tough none the less!

Xdrive - this may be a stupid question, but why do diesel cars produce more torque? I never quite understood that. Either way I'm just realizing torque is what you need on the highway to go? BHP, of the line?
Not certain either but I think it's related to greater cylinder pressure and/or stroke length - the former is needed due to how diesels produce combustion versus gasoline. Both will provide more torque though - though I am not sure of the 640d cylinder dimensions, so a longer stroke may not be playing a role.

At highway/high speeds, torque becomes less important. Of course, more is still helpful, but not as noticeable as during a 0 - 60 contest.
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Previous Rides
2012 650i xDrive - Loved it! 2010 535i xDrive - Very competent. Too sensible? 2008 Audi S6 - Still miss the V10.
2003 Maserati Coupe - The end of an era. 2002 Maserati Coupe - Gone and mostly forgotten. 2002 MB CLK 430 - Gone but not forgotten.
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  #9  
Old 07-21-2012, 03:10 PM
roadsta roadsta is offline
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power and torque

In the end, it is always about power.

Revs x torque = power. (In the same way that force x speed = power, in a linear situation.)

So, torque in part determines how much power a car has, but it also depends on the revs at which it can produce that torque.

An engine that produces high torque, but runs out of revs quickly, cannot keep up with one that has similar torque but can rev higher.

A classic is a Formula 1 engine - nowadays a 2.4 liter V8 without turbos. It produces lower torque than a 650 or even a 640, but it can rev to around ~20,000 rpm - that's why they still produce around 800 hp from a engine that has less displacement than many small cars on the road today.

Power is the amount of work per time unit, and determines how much energy can be converted per time unit - how much speed can be 'added' in a given time.

http://www.epi-eng.com/piston_engine...and_torque.htm

r
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Last edited by roadsta; 07-21-2012 at 03:11 PM. Reason: typo
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  #10  
Old 07-22-2012, 12:34 AM
gehmjc21 gehmjc21 is offline
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Quote:
Originally Posted by roadsta View Post
In the end, it is always about power.

Revs x torque = power. (In the same way that force x speed = power, in a linear situation.)

So, torque in part determines how much power a car has, but it also depends on the revs at which it can produce that torque.

An engine that produces high torque, but runs out of revs quickly, cannot keep up with one that has similar torque but can rev higher.

A classic is a Formula 1 engine - nowadays a 2.4 liter V8 without turbos. It produces lower torque than a 650 or even a 640, but it can rev to around ~20,000 rpm - that's why they still produce around 800 hp from a engine that has less displacement than many small cars on the road today.

Power is the amount of work per time unit, and determines how much energy can be converted per time unit - how much speed can be 'added' in a given time.

http://www.epi-eng.com/piston_engine...and_torque.htm

r
Roadsta, good stuff thank you!

This makes me want the dinan tune that much more
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2012 F12 650i X drive-retired

2014 F10 - 550i X drive
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  #11  
Old 07-22-2012, 04:07 PM
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xDrive McGee xDrive McGee is offline
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Took my 6 on the highway for the first time last night. Wow. Just, wow.
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Previous Rides
2012 650i xDrive - Loved it! 2010 535i xDrive - Very competent. Too sensible? 2008 Audi S6 - Still miss the V10.
2003 Maserati Coupe - The end of an era. 2002 Maserati Coupe - Gone and mostly forgotten. 2002 MB CLK 430 - Gone but not forgotten.
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  #12  
Old 07-22-2012, 08:13 PM
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TopDownInFL TopDownInFL is offline
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Originally Posted by xDrive McGee View Post
Took my 6 on the highway for the first time last night. Wow. Just, wow.
If there was a 'Like' button I'd have pressed it.
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  #13  
Old 12-04-2012, 09:27 AM
babyboss babyboss is offline
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hey u big daddy's (V8) picking on sml daddy's (S6) .. LOL ...
but som cool runs ..
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