Perhaps the decision is not about emissions and mpg if Audi can do this https://www.autoexpress.co.uk/audi/s8/107274/new-flagship-audi-s8-revealed-with-563bhp
A glut of diesel engines?
If the first tests of the hybrid technology and the electric booster engines are to be believed then prepare to be very disappointed https://www.carmagazine.co.uk/car-reviews/audi/sq8/
Whilst that is true it will still mean that a instant response they claim this engine technology will be capable of has been wasted. Therefore they've, once again, shot themselves in the foot..My interpretation of this is that it's actually the gearbox rather than the engine. Seems to improve Drive->Sport->Manual modes on the box in the article so I imagine that it's down to the terrible ZF programming from Audi rather than the outright engine performance. Could be wrong but I can't understand how a 900Nm engine could feel like it didn't have much punch otherwise.
Those ZF gearboxes may be good, but they are still based on the torque converter principle and until the lock-up clutch engages there is a soft link between the engine and the transmission. Quoting figures from a factory engine dyno does not tell the whole story and we never seem to see the true extend of transmission losses.
Whilst that is true it will still mean that a instant response they claim this engine technology will be capable of has been wasted. Therefore they've, once again, shot themselves in the foot..
I'm not sure what point you are making. Of course all clutches slip when engaging, but in a dual clutch gearbox the effect on torque transmission is very slight. For ZF's own DCT they claim 100-300ms between shifts. But as you know, a torque converter relies on slip for its very principle of operation: There is always a difference in rotational speed between the impeller and turbine and torque transmission is proportional to the slip speed. The losses are reduced due to the action of the lock-up clutch, but of course that only engages when the slippage is no longer needed for acceleration, i.e. when cruising.Yes, but if you're running that theory then a manual or dual clutch is the same because the clutch will be slipping initially before it's fully engaged. I don't think that's a very good arguement because no ICE vehicle will have zero slip from the engine/transmission interface (the crazy solutions of things like the Koenigsegg Regera aside...) and all will have some transmission losses with modern torque converters being far more efficient than days of old.
I'm not sure what point you are making. Of course all clutches slip when engaging, but in a dual clutch gearbox the effect on torque transmission is very slight. For ZF's own DCT they claim 100-300ms between shifts. But as you know, a torque converter relies on slip for its very principle of operation: There is always a difference in rotational speed between the impeller and turbine and torque transmission is proportional to the slip speed. The losses are reduced due to the action of the lock-up clutch, but of course that only engages when the slippage is no longer needed for acceleration, i.e. when cruising.
That's quite a good article @cuke2u
@Daggerit - The question is not how fast the gears are selected. As I noted ZF quote 200-300ms for their own DCT. I haven't seen figures for their TC auto boxes, but it must be similar. After all it is simply a matter of engaging or releasing brake or clutch pack in combination to change the configuration of the planetary gears. However the key difference between DCT and TC boxes is that when torque transfer is required, i.e. there is acceleration demand, the DCT is transmitting the torque through an engaged clutch pack whilst the TC box is transmitting it through a fluid. Whilst the fluid method works well, an indeed has the benefit of torque multiplication when there is a high slip speed, it simply cannot be as responsive to changes in torque transfer as the engaged clutch pack of a DCT. But I do not know the intricacies of the most modern design TC boxes and am ready to accept that they are very good. I am just making the point in direct response to the above discussion following the review of the SQ8 which has criticised its responsiveness. I still believe that at least part of the problem is the simple fact that there is elasticity in a TC gearbox which is why they have had the label "slush box".
S4 is now on the below configurator.
http://dcc-1.audi.de/controller?event-new-conf=1&mandant=dcc-uk-audi
So from what I can see the only free colour is now white? Not even a flat black?
And the interior options are black or grey, no red?
Entry area lights are now seemingly £115 option?
Fair play that the standard wheels look better than the ones I had on mine, but those are surprising changes to me.
Zippy - not sure how you've handled the wait!!
You do realise that is a german configurator, not uk or any other country, thus the options available to other countries may well be different...So from what I can see the only free colour is now white? Not even a flat black?
And the interior options are black or grey, no red?
Entry area lights are now seemingly £115 option?
Fair play that the standard wheels look better than the ones I had on mine, but those are surprising changes to me.
Zippy - not sure how you've handled the wait!!
You do realise that is a german configurator, not uk or any other country, thus the options available to other countries may well be different...
So, the latest update in the 'never-ending' saga of my S4 lease order, placed early April 2018 (!), is that the base price for the new S4 TDI is confirmed per Robbe's email link, above (thanks Robbe): a round £48000 ROTR, without options.
However, the full UK price list, with all possible options, is still not available (should have been at the end of June) and therefore still not available to order (should have been this week, w/c 8th July). My dealer was pretty hopeful that I would have it by September but I'm guessing that the usual summer production line closure is imminent, so who knows?! If I do get it in September, it will be at least 17 months from order to delivery. I could probably have got a hand built Bugatti delivered more quickly !
The reviews are coming in and seem quite positive overall:
https://www.autoexpress.co.uk/audi/s4/107450/new-audi-s4-2019-review
https://www.autocar.co.uk/car-review/audi/first-drives/audi-s4-2019-review
https://www.evo.co.uk/audi/s4/22896/2019-audi-s4-tdi-review-audis-c43-amg-rival-goes-diesel
The reviews are coming in and seem quite positive overall:
https://www.autoexpress.co.uk/audi/s4/107450/new-audi-s4-2019-review
https://www.autocar.co.uk/car-review/audi/first-drives/audi-s4-2019-review
https://www.evo.co.uk/audi/s4/22896/2019-audi-s4-tdi-review-audis-c43-amg-rival-goes-diesel
Pipes look terrible and cheap
I can imagine M3 drivers coming up behind the car and nearly having an accident through a fit of giggles at what they would see as ordinary A4 made out to be a S4. Until it shoots off into the distance that is.
There is going to be a hell of a market for replacement rear boxes with quad exhausts...
Then substitute whatever car you like, twas only a example