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Discussion Starter · #1 ·
Anyone got gearbox and final drive ratios for the SQ5 I like to work out the MPH/1000 RPM
 

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Discussion Starter · #3 ·
Thanks, no mention of final drive ratio though,but no way does it do 50mph/1000 rpm! the car I tested using the speedo and rev counter (may not be that accurate) was 81mmph @ 2000rpm
 

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In 8th gear I would say 50mph/1000rpm is pretty accurate - will check on my way home and post exactly what it is...
 

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Indicated 50mph is a smidge over 1100rpm in 8th gear...
 

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Discussion Starter · #7 ·
Indicated 50mph is a smidge over 1100rpm in 8th gear...
Just worked it out using 3.2 final drive and it comes out at 40.3mph/1000 rpm right on my 81mph @ 2000. Can you actually get the revs down to 1100 in 8th? you need to be on a neutral throttle not lifted off etc
 

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If you put the Drive Select in 'E' (note that Drive Select is an option) then it is quite happy to cruise below 1100rpm in 8th... Or indeed if you take manual control it won't force a downshift until about 950rpm in my experience.

The tricky thing here is we are dealing with a viscous coupling - so the input/output RPM on either side of the box is not going to be exactly as per the ratios - unless the the lockup clutch is engaged making it true to the ratios... but let's assume that the lockup clutch is doing its job and engaging once you are cruising.

I will attempt 40.3mph and see what RPM I get on the way home!! I will also do 81mph and see what rpm I get...
 

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I would say your calculations are correct. I got 80mph indicated at about 1950rpm and just about manage to hold 40mph at bang on 1000rpm, its keen to shift down to 7th though!
 

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Discussion Starter · #10 ·
Hi José, That's good I thought my calcs were wrong. I will post the other ratios later. I like to know what speeds are available in each gear.

johnasq5
 

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Discussion Starter · #11 ·
SQ5 8speed Gearbox:
For those interested in such things I have worked out the speeds per 1000rpm in each gear.

1st 5.7 2nd 8.6 3rd 12.8 4th 16.1 5th 21 6th 27 7th 32 & 8th 40.3

These are two interesting technical sites for all cars http://www.carfolio.com/specifications/models/car/?car=284548
and http://www.automobile-catalog.com/

although Automobile-catalog has the final drive ratio as 3.76 but courtesy of José it should be 3.20 which my calculations confirm. Next I want to find the Rotor sizes, any one got that info? johnasq5
 
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