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#1
12th September 2015, 07:31 PM
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V10 S8 top speed governor
How many owners have tested this? I'm in Germany and have been trying out the autobahns. The handbook says it is limited to 250kmh. So imagine my surprise at hitting 255, with the car still pulling hard (then had to brake as I ran out of empty road).
Anyone else found the 250 limit appears to be a bit soft? Also, booting it from 180-190 or so is a formidable experience! It leaps forward and then continues to accelerate hard.
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S8 V10, 2006, Daytona FFRR 4.2 SC, 2006, Black Putting squashed dinosaur world to good use. 
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#2
12th September 2015, 08:18 PM
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Depends where you are in Germany and on which autobahn.
I used tofind that silly o'clock in the morrning on the A61 was pretty good and the A7 used to be brilliant before they completed the southern end because traffic started to use it then. 
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Ray at Wigan Pier 2014 A8L D4 4.0TFSI Gold (Sticker says "Beige") Can't leave you in a black smoke cloud anymore.. In progress, Nothing left to do.  Gone 2004 A8 D3 3.0 TDI. Ebony Pearl Black (with little bits of other colours and glitter)
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#3
12th September 2015, 11:00 PM
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The car is meant to be limited to 155mph so that's pretty close to your 255 kmh and given the optimistic speedos i would think you would be close to hitting the limiter
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Del
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#4
13th September 2015, 07:21 AM
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I think car being German the limit is set in km/h at 250 not at 155mph but it's pretty much the same speed anyway. Speedo reading is is way out, you will be seeing about 280 on the clock by the time 250km/h limiter kicks in. Compare the speed on the clocks to GPS and you will see the difference or even better to the speed in VCDS as that is the speed that limiter will use and it can vary from GPS speed depending on tyre size and wear.
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Currently 8less 2011 Q7 S Line 3.0TDI, 2016 Tesla Model S 90D 8 history: 2006 A8 Sport 4.2TDI quattro SOLD, 1997 S8, reached end of life with gearbox failure
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#5
13th September 2015, 05:11 PM
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I wondered about speedo error. But how does the car know its real speed (ie not the speed that the speedo is showing). I thought to establish speedo error you had to hook up some external measuring equipment. If the car knows the real speed it is travelling, why not tap into that?
I have a VCDS cable but not on me. Might poke around when I get back. Also have a GPS watch with me so might see what that reads compared to the speedo. Did that once on a plane. The watch was pretty close the speed reported on the moving map!
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S8 V10, 2006, Daytona FFRR 4.2 SC, 2006, Black Putting squashed dinosaur world to good use.
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#6
13th September 2015, 10:34 PM
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My D2 S8 didn't limit itself until it hit an indicated 177 mph on the clocks....
I didn't have GPS back then to verify, and 155 to 177 is a bit of an large percentage error if im honest, but 177 is defo when it *could* keep pulling, but electronically decided not to.... I've no reason to believe its factory 155mph was in any way compromised.... There was us, and 2 other random A6's we'd picking up doing a 155 mph convoy all clearly sat on the limiter early in one morning. It was quite surreal really. No one could go any faster lol...
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For parts enquiries and Forum User Administration please contact customer services directly, not me  - enquiry@a8parts.co.uk, www.a8parts.co.uk, or call 01642 783537The Daily Town Car - 2023 Tesla Model Y Performance. Black with Black. Giant ipad screen, huge sunroof, 4 wheel drive, Tow bar, lots of ooomph and made in China, so actually built properly unlike the Californian ones. The Family Wagon - 2018 Tesla Model X. Black, 7 Seats, Towbar, Homelink, Enhanced Auto pilot with Summon and self park, Heated front seats, CCS Charger upgrade, MCU2 Upgrade, Falconwing Doors, Self opening / closing doors, Netflix, Spotify, toys, Air suspension, alcantara roof + lots of other stuff...... The 17 year old Driver Wagon 2015 Skoda Citigo Monte Carlo. Alloys, Power steering, Aircon, Leccy windows, Sat Nav, bluetooth, central locking, cup holders, 59 whole bhp. Million times better than my first car. Well jealous..... The First 20 Audis: 2001 D2 4.2 QS Silver, 1997 D2 S8 Silver, 1999 D2 4.2 Silver, 2002 D2 S8 Dolphin Grey, 2003 C5 RS6 Blue, 1998 D2 S8 Black, 2000 D2 4.2 QS/S8 Ming Blue, 2003 D3 4.2 Ming Blue, 2005 B7 S4 Blue, 2006 D3 3.0 Tdi Black, 1999 D2 4.2 Silver, 2003 D3 4.2 LPG Crystal Blue, 2000 D2 S8 Silver, 2007 3.0 Tdi Q7 Black, 2009 B8 S4 Black, 1998 D2 S8 Agate Grey, 2006 D3 4.2 Tdi Blue, 2006 D3 S8, 2007 Q7 3.0 Tdi, 2006 C6 S6, The Second 20 Audis: 2011 A7 Sline, 2001 A2 1.4 Tdi Black, 2002 A2 1.4 Tdi Silver, 2006 A8 4.2 Tdi Blue, 2007 4.2 Tdi Q7, 2006 S4 Cab Silver, 2010 RS6 Saloon Black  , 2007 TT Roadster, 2010 A8 D4 4.2 Silver, 2006 C6 A6 2.7 Tdi Quattro, 2000 D2 4.2 QS/S8 Ming Blue (again), 2008 Q7 4.2 Black, 2009 C6 RS6 Saloon Daytona Grey, 2001 Fully Loaded A2 Tdi, 2006 Avant S6 Black, 2007 VW Caravelle Exec Black (almost an Audi) 2009 TT Roadster Daytona, 2015 Q7 4.2 tdi lava grey, 2002 GmbH D2 demonstrator, 2006 D3 A8 LWB 4.2 Tdi Black Most Recent Audis: 2001 A2 1.4 Tdi Black, 2007 4.2 FSi Q7 ABT Blue, 2016 S5 Coupe Launch model, 2004 S4 B6 Cabriolet, 2016 Q7 Sline White, 2006 Q7 4.2 FSi Black, 2012 Q7 Sline+ 4.2Tdi White, 2008 Blue Audi S8 Everything Else 1989 Subaru Justy, 1986 Vauxhall Cartlton 2.0 GL, 1985 Vauxhall Carlton 2.2 CDi, 1987 Ford Sierra XR4x4, 1983 Vauxhall Senator, 1985 Vauxhall Senator 3.0i, 1997 Polo Saloon, 1997 Peugeot 306 1.9 TDi, Ford Sierra Sapphire 2000E, 1990 Subaru Justy, 2000 Subaru Impreza, 2000 Subaru Impreza RB5, 1993 Range Rover LSE, 2005 VW Bora, 2003 Skoda Superb, 2003 VW Passat V6 4 Motion, 1996 Peugeot 106, 2000 Range Rover 4.0, 2019 Tesla Model 3 Performance
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#7
14th September 2015, 03:45 PM
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Got a better run on the way home. The limiter cuts in at 260 and a little bit (topped out just on 260 the first time, but the second was still pressing I as I hit it). Nothing dramatic; you just see the rev needle dropp a couple of thousand rpms suddenly.
Got absolutely *blitzed* by a Carrera GT when I was doing around 190kmh. Appeared in my mirror like an incoming missile! Pulled over fast without holding it up too much and it rocketed off into the distance. Giving it full beans meant I could keep it in sight, but although I had thought traffic had been moving over for me, that thing might as well have been vaporising the cars in front of it!
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S8 V10, 2006, Daytona FFRR 4.2 SC, 2006, Black Putting squashed dinosaur world to good use.
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