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      10-16-2011, 12:29 PM   #1
Lotus7
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Euro X3 35i Acceleration Graph

There is a You Tube video of a 35i flat out acceleration run (Sport Mode). This appears to be a pretty quick 35i.

Since I haven't seen a published acceleration curve for a 35i, I did a frame-by-frame analysis and extracted the speed/time curve.
The values are from the speedometer readings, so if this is a typical 35i, they are probably about 1.5% to 2% higher than the real speeds. This 35i reached an indicated speed of 255kph in 69 seconds (in 6th gear).

Note, the plotted time is not the You Tube video time, but is the actual time from the start of acceleration as indicated by the speedometer. Graphed data points are at 1 sec. intervals up to 29 seconds.
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      10-16-2011, 12:44 PM   #2
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Quote:
Originally Posted by Lotus7 View Post
There is a You Tube video of a 35i flat out acceleration run (Sport Mode). This appears to be a pretty quick 35i.

Since I haven't seen a published acceleration curve for a 35i, I did a frame-by-frame analysis and extracted the speed/time curve.
The values are from the speedometer readings, so if this is a typical 35i, they are probably about 1.5% to 2% higher than the real speeds. This 35i reached an indicated speed of 255kph in 69 seconds (in 6th gear).

Note, the plotted time is not the You Tube video time, but is the actual time from the start of acceleration as indicated by the speedometer. Graphed data points are at 1 sec. intervals up to 29 seconds.
0-60 in 5 seconds, I don't think so. My 550i M Sport is not much better than that and it's miles quicker than any 335i in any bodywork.
Very difficult to map from a video.
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      10-16-2011, 12:50 PM   #3
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I can't speak for the accuracy of the numbers above, but i like watching the video, watching the RPM and shift points when you put it in double sport mode (both the button and the shift lever) and flat out floor it. never gets past 6th but i am not surprised since 7th and 8th are both overdrive.

The US spec cuts off at what 130MPH and speeds closer to 100MPH could land in jail...

also, when that X3 really gets rolling, anyone else notice the wind noise is louder than the N55? to reduce drag, get in an M3.
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      10-16-2011, 12:51 PM   #4
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Quote:
Originally Posted by johnbmw6 View Post
0-60 in 5 seconds, I don't think so. My 550i M Sport is not much better than that and it's miles quicker than any 335i in any bodywork.
Yep, seems a little too quick. Also the 255 kph indicated top speed is way over the limiter. I suspect this car has a optimistic speedometer or was running downhill at the start.

It is fun to watch the tenth kilometer digit clicking off once every second.

It's too bad the fuel consumption gauge is pinned. It would be interesting to know the fuel rate at 150 mph.
I had a Subaru Legacy Turbo once that was boosted to 16psi. At full throttle the Subi digital fuel rate display read 1.8 mpg.

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      10-16-2011, 01:15 PM   #5
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Quote:
Originally Posted by Lotus7 View Post
Yep, seems a little too quick. Also the 255 kph indicated top speed is way over the limiter. I suspect this car has a optimistic speedometer or was running downhill at the start.

It is fun to watch the tenth kilometer digit clicking off once every second.

It's too bad the fuel consumption gauge is pinned. It would be interesting to know the fuel rate at 150 mph.
I had a Subaru Legacy Turbo once that was boosted to 16psi. At full throttle the Subi digital fuel rate display read 1.8 mpg.
Yea my wife borrowed the M6 to drive to wales once and she came back fuming, she said "I had to fill that thing twice in 250 Miles" , I had to laugh.
I said " you must drive slower" she said "70 miles an hour all the way and obeyed every limit "
Thats a V10 for you.
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      10-16-2011, 01:20 PM   #6
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Must be a lucky German owner who is able to max out the speed without risk of a ticket. The only risk appeared to be holding a video cam whilst driving at 250k, at least you can't identify the car/owner or else they might get a ticket.....
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      10-16-2011, 01:55 PM   #7
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Quote:
Originally Posted by tank531 View Post
... The only risk appeared to be holding a video cam whilst driving at 250k, at least you can't identify the car/owner or else they might get a ticket.....
In the US and I suspect the UK, it would get you a cozy cell for quite a while.
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      10-16-2011, 02:37 PM   #8
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The initial 335i coupes were road tested at around 4.8s to 60. They were found to be around 340 bhp, possibly BMW said 306 bhp so as not to upset M3 buyers.....and the reality is that on the road they are faster than the M3, on the track the M3 wins out.

The X3 is heavier but it's also 4 wheel drive so depending on the current 35i engine maybe the figures are not that far out.

My E93 335i was VERY rapid, even with the vert added weight.
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      10-16-2011, 03:09 PM   #9
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Just watched the 3.0D, link on the same page. Looked like 0 - 60 = 6 sec, 0 - 100 = 16sec. Not bad for a 4x4 that does around 40 (uk) mpg!

Hit's the limited at 210km/h, so the speedo on that one is accurate.
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      10-16-2011, 03:13 PM   #10
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For the 2.0D I estimate it was about 8.3 to 60 and 23.5 to 100mph.
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      10-16-2011, 03:37 PM   #11
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Quote:
Originally Posted by greg2step View Post
The US spec cuts off at what 130MPH and speeds closer to 100MPH could land in jail...
With the SAP or M-sport the limiter is placed at 150 mph. 150 mph = approx. 241 kph. So maybe an idealistic speedometer. I've seen other cars exceed their claimed electronic limit for whatever reason.
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      10-16-2011, 05:13 PM   #12
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Quote:
Originally Posted by clivem2 View Post
The initial 335i coupes were road tested at around 4.8s to 60. They were found to be around 340 bhp, possibly BMW said 306 bhp so as not to upset M3 buyers.....and the reality is that on the road they are faster than the M3, on the track the M3 wins out.

The X3 is heavier but it's also 4 wheel drive so depending on the current 35i engine maybe the figures are not that far out.

My E93 335i was VERY rapid, even with the vert added weight.
Having sold the 2010 M3 I can hand on heart say There ain't a 335i that could live with it any time any where.
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      10-16-2011, 05:24 PM   #13
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Quote:
Originally Posted by johnbmw6 View Post
Having sold the 2010 M3 I can hand on heart say There ain't a 335i that could live with it any time any where.
On a track I'd agree; cross country driving with traffic around you then nope. 335i is far more driveable. Rather like the down on power Renault F1 engine.


Edit:

Now that I'm not on my smart phone, let me explain my comment some more.

1) The M3 has a better suspension set up.

2) The 335i "electonic diff" is a poor excuse for a diff.

3) The M3 has clearly superior power when on cam.

4) The 335i has a very broad power band, not so much on cam but on turbo. 1500rpm to 6500 rpm

Of course it's possible to drive on public roads the way we can on a race track but 98% of the time points 1) and 2) are irrelevant - on public roads. Even the lesser 335i has so much grip that it's very difficult to exceed it's limits on public roads. Ok, if you find some deserted US or Oz road so you can use it as your private race track...

It's point 4) that for me is the clearest difference between the cars, for sure peak power of the M3 is superior but the sheer driveability of the 335i on most public road journeys actually makes it quicker (marginally). Put the cars on the track and the deficiencies of the 335i become apparent very quickly.
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      10-17-2011, 03:19 AM   #14
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Quote:
Originally Posted by clivem2 View Post
On a track I'd agree; cross country driving with traffic around you then nope. 335i is far more driveable. Rather like the down on power Renault F1 engine.


Edit:

Now that I'm not on my smart phone, let me explain my comment some more.

1) The M3 has a better suspension set up.

2) The 335i "electonic diff" is a poor excuse for a diff.

3) The M3 has clearly superior power when on cam.

4) The 335i has a very broad power band, not so much on cam but on turbo. 1500rpm to 6500 rpm

Of course it's possible to drive on public roads the way we can on a race track but 98% of the time points 1) and 2) are irrelevant - on public roads. Even the lesser 335i has so much grip that it's very difficult to exceed it's limits on public roads. Ok, if you find some deserted US or Oz road so you can use it as your private race track...

It's point 4) that for me is the clearest difference between the cars, for sure peak power of the M3 is superior but the sheer driveability of the 335i on most public road journeys actually makes it quicker (marginally). Put the cars on the track and the deficiencies of the 335i become apparent very quickly.
Point 4/ would be my only "Gripe" about the M3, I addressed that with the 550i M Sport. Mental torque from 1200 RPM, as you say much more drivability on public roads.
Thereafter we differ.
The M3 is not a Daily Driver though, so if thats were you were going I would have to submit and agree in general.
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      10-17-2011, 04:21 AM   #15
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Quote:
Originally Posted by johnbmw6 View Post
Point 4/ would be my only "Gripe" about the M3, I addressed that with the 550i M Sport. Mental torque from 1200 RPM, as you say much more drivability on public roads.
Thereafter we differ.
The M3 is not a Daily Driver though, so if thats were you were going I would have to submit and agree in general.
I think we're so close to agreement that most people wouldn't see a difference!

Your 35D will be tremendous. I'm really enjoying the 30D, the extra you'll get will be great to have. Even with the 30D I don't feel I've lost too much vs the 335i, though of course it's a diesel and it's character is not the same as a petrol. I've got a loan 318i Touring while they experiment with the wind noise issues I have on my X3. The 3 series now feels so crude and toy-like.
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      10-17-2011, 05:24 AM   #16
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Quote:
Originally Posted by clivem2 View Post
I think we're so close to agreement that most people wouldn't see a difference!

Your 35D will be tremendous. I'm really enjoying the 30D, the extra you'll get will be great to have. Even with the 30D I don't feel I've lost too much vs the 335i, though of course it's a diesel and it's character is not the same as a petrol. I've got a loan 318i Touring while they experiment with the wind noise issues I have on my X3. The 3 series now feels so crude and toy-like.
I think the torque will be very strong with this new engine, I will let you know, how long have you had your 3.0 Diesel ?. I am surprised your suffering wind noise, I test drove a 2.0 Diesel (11 plate) and it was quiet!!. It can not affect all X3's.
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      10-17-2011, 06:05 AM   #17
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Quote:
Originally Posted by johnbmw6 View Post
I think the torque will be very strong with this new engine, I will let you know, how long have you had your 3.0 Diesel ?. I am surprised your suffering wind noise, I test drove a 2.0 Diesel (11 plate) and it was quiet!!. It can not affect all X3's.
I've had the car for 5 weeks / 1500 miles. There's noise from the mirrors getting in somewhere. BMW have a PUMA case on it and have someone taping up the mirrors and vents today to try solve it. It's not bad but it's not right either, previous advice for replacing the insulation in the triangle where the mirrors attache to the door does not apply to my build date. It only seems like a few have this wind noise, they don't seem think it's the door seals either so my car is a guinea pig today, oink!

Torque should be amazing with the new engine. Even with the 30D when I drive up a normally troublesome steep hill near home the car launches up it saying to me "what hill?".
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      10-17-2011, 07:11 AM   #18
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Quote:
Originally Posted by clivem2 View Post
Torque should be amazing with the new engine. Even with the 30D when I drive up a normally troublesome steep hill near home the car launches up it saying to me "what hill?".
I'm jealous reading this description!
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