I've managed to find a petrol vRS DSG for a test drive & I noticed that the internal gear ratios (& possibly the final drive gearing) have been changed.

In 6th the car has to cope with really high gearing, approx. 35 mph per 1K rpm. or 70 mph = 2K rpm.

So, if you want to accelerate at 60 mph, the tranmission drops down to 5th, which is not conducive to good real-world economy!

Driving around some country roads & keeping to a 40 mph speed limit, the DSG wouldn't shift above 4th, even on a light throttle. It would shift up if one selected 5th manually, but in "D" it wouldn't stay there for long.

Very different to the 6-speed DSG's that we have in our own cars, they will change up into 6th at 38/40 mph, but that's with much lower overall gearing, approx. 26 mph per 1K rpm.

I'm guessing that this has been done to produce good results for the official fuel consumption / emission level tests, but just might effect fuel consumption in the real world!

FWIW, a 25ish mile drive on the M6, cruising just under 60 mph (low fuel warning light on....) returned 34 mpg.

Not that promising, given that similar driving in herself vRS gives 40/41 mpg, or that I averaged 36.9 mpg in the Superb on the way up to Gaydon & 39 mpg driving home from Rugby later that evening.

Any thoughts peeps?

DC

Here's the gear ratios, manual/DSG, petrol/diesel:

 

 

Nice graphs, useful info - thanks

Compared to my 2012 FL MkII vRS TDi DSG the new MkIII would appear to have the same gear ratios in 1st and 2nd but higher ratios in 3rd. 4th, 5th and 6th.  Would also appear to just about reach top speed in 5th (and 6th?).

Edited 1 August, 201312 yr by philbes

Further to my earlier post - the posted chart states the max revs for the 2.0TDi vRS as 4400rpm whereas my 2012 vRS is red-lined at 5000rpm as are other VAG cars with the same '170' engine.  HAs the rev limit really been so reduced on the latest, more powerful, version of the engine?

No, it's not. You just don't get any mechanical benefit from the engine above 4400rpm, so it's basically pointless to rev past that point and you should engage the next gear. Turbo diesel engines behave differently from normally aspirated petrol engines, as you know.

 

You can spot in the graphs that all available gearboxes have quite tall 4th, 5th and 6th. This is only to help with economy. Also top speed is for 5th gear, 6th is just for motorway cruising (which I think is fine).

I agree that there is no point in revving the diesel vRS beyond 4400rpm, although in Sports mode on full throttle the DSG in my car takes the engine closer to the red-line.  Usually manufacturer's figures for max speed in the gears are quoted at max revs.  I think that Skoda's quoting max. useful max speed in the gears is better.

 

I would prefer the higher gearing of the MkIII in 4th, 5th and 6th (3rd is also higher) over the gearing in my car.

Full thottle on the vRS 2.0 TSI AT (DSG) would make the car change to 6th gear around ~280 km/h ???

How does these charts comply when you add windresistance ?

The chart is simply the theoretical speeds available in each gear.  Purely mechanical calculation of gearing x revs.   My 2012 vRS with DSG as a 6th gear ratio of 32mph/1000rpm so at 5000rpm would be doing 160mph.  However, wind resistance, etc. means it tops out at 139mph at 4350rpm (which is over the max power revs of 4200rpm so the car is over-geared slightly in top gear).

 

it appears that the MKIII vRS 2.0TSI DSG is over-geared in 6th AND 5th gear.

The chart is simply the theoretical speeds available in each gear.  Purely mechanical calculation of gearing x revs.   My 2012 vRS with DSG as a 6th gear ratio of 32mph/1000rpm so at 5000rpm would be doing 160mph.  However, wind resistance, etc. means it tops out at 139mph at 4350rpm (which is over the max power revs of 4200rpm so the car is over-geared slightly in top gear).

 

it appears that the MKIII vRS 2.0TSI DSG is over-geared in 6th AND 5th gear.

 

 

My point being exactly that you take the charts and then add your own assumptions :-)

Here's the gear ratios, manual/DSG, petrol/diesel:

 

Can someone repost these, please? I really need these to configure my laptime logger software

Here you go!

Here you go!

Thank you very much!

Hmm. My vrs tsi dsg shifts nicely into 5th approx 40mph and very quickly into 6th at around 40mph. I can achieve over 40mpg in good motorway conditions.

I've always found the dsg too keen to shift up if I'm honest.

All VAG cars with DSG that I drove seemed to hold too much to the gears.

In Sport mode it was ridiculous...

Hmm. My vrs tsi dsg shifts nicely into 5th approx 40mph and very quickly into 6th at around 40mph. I can achieve over 40mpg in good motorway conditions.

I've always found the dsg too keen to shift up if I'm honest.

Interesting, I have the same wide-ratio 6-speed DSG in my EOS & it won't shift into 6th until 50 mph.

The close-ratio DSG in my Superb will shift into 6th at 40 mph, app. 1600 rpm.  

They will shift early, but only on a light throttle, it works 'cos the 2.0 TSi is quite torquey & very tractable.

Certainly holds on to the lower gears far too long in sport mode, IMHO.

 

But at least it hasn't got the ridiculously low first gear like the 7 speed box.

Edited 6 April, 201610 yr by FlyingGecko

Certainly holds on to the lower gears far too long in sport mode, IMHO.

 

But at least it hasn't got the ridiculously low first gear like the 7 speed box.

I only use sport mode if I need to "depart rapidly", or want some extra engine braking

before a roundabout or descending a steepish hill.

 

Otherwise normal D + using the paddles as & when required, works best for us.

 

DC

Yep, I use the paddles to drop and/or hold a gear when I want it to.