160+ mph S2 Avant

[SR71]

I once worked out on my 12R that at ~200mph you need an additional 3hp for every additional 1mph. I've been trying to get it over 200mph for 3 years.

http://www.200mph.net/smf/index.php?topic=2370.0

So the difference between claiming my bike will do 195mph versus it'll do 200mph is worth approximately 15hp.

My Akrapovic gained me 17hp and took the bike to ~185hp and ram-air might get me a few more but the difference between 197 and 200 is 10hp worth. Well where the hell am I going to find that 10hp from?

Similarly you can see how much hp a tailwind is worth when you're trying for top speeds.

In the S2, about as aerodynamic as a brick, I'd hazard a guess its similar.

I've had 3 230hp cars now and all of them struggle for the last few mph above 145mph on the flat.

My angle is that there is no way a stock S2 can hit 160mph. I can't think of any other 230hp cars that will either bar that mental Lotus 240R (243hp). The 330Ci claims 231hp/155mph.

Someone get a GPS read-out and prove me wrong!

[Chris5044]

ib got 260kph on a stock s2 hhmm thats yes 162mph mate!!!!!! wouldnt go any faster
that was in germany

[Jas11n]

I never go over 70 mph

Not sure on the Avants being faster though, don't the fluffy slippers slow them down a bit ?

[HPmuirt]

Not sure on the Avants being faster though, don't the fluffy slippers slow them down a bit ?

No mate, no way are they faster than the Coupe, as the extra weight of the coffin slows them down

Ask BRY, he ended yp having to buy a Coupe, when he realised I wa right and that he was driving a hearse

Cheers n

Si

[charlie]

I once worked out on my 12R that at ~200mph you need an additional 3hp for every additional 1mph. I've been trying to get it over 200mph for 3 years.



So the difference between claiming my bike will do 195mph versus it'll do 200mph is worth approximately 15hp.

My Akrapovic gained me 17hp and took the bike to ~185hp and ram-air might get me a few more but the difference between 197 and 200 is 10hp worth. Well where the hell am I going to find that 10hp from?

Similarly you can see how much hp a tailwind is worth when you're trying for top speeds.

In the S2, about as aerodynamic as a brick, I'd hazard a guess its similar.

I've had 3 230hp cars now and all of them struggle for the last few mph above 145mph on the flat.

My angle is that there is no way a stock S2 can hit 160mph. I can't think of any other 230hp cars that will either bar that mental Lotus 240R (243hp). The 330Ci claims 231hp/155mph.

Someone get a GPS read-out and prove me wrong!

I agree no stock S2 will do anything more than 150 mph and this is a car
that is when the car isrunning right.
Lets remember V-max of a stock RS2 is 163mph and that has 85bhp more
and 90 ish lb-ft torque. Cog ratios r the same but slightly stronger box.
Everybody knows of a stright piece of road that would flatter you cars
performance :mischeif: but would not admit to the gradient of the road.

[BRY]

No mate, no way are they faster than the Coupe, as the extra weight of the coffin slows them down

Ask BRY, he ended yp having to buy a Coupe, when he realised I wa right and that he was driving a hearse

Cheers n

Si

I bought the coupe to save it from the SALvage man :mischeif:
It came free with a 20v CQ, as these coupes are so common.
Slipper wagons rule, I know I own both

[flossymeister]

Lets remember V-max of a stock RS2 is 163mph and that has 85bhp more
and 90 ish lb-ft torque.

Just my 2p on this but RS2 is speed limited to 163, IIRC. Think you can't get it over 6500 or 7000 rpm in 6th. I don't know how much faster a stock RS2 goes if you take off its limiter, though? Anyone got any ideas? I remember getting a lift from a guy once who claimed his de-limited stock one showed 178.... but i was never too sure of the truth of that. Given J's (SR71) maths it could be 170+ for sure??

Tim

[HPmuirt]

Just my 2p on this but RS2 is speed limited to 163, IIRC. Think you can't get it over 6500 or 7000 rpm in 6th. I don't know how much faster a stock RS2 goes if you take off its limiter, though? Anyone got any ideas? I remember getting a lift from a guy once who claimed his de-limited stock one showed 178.... but i was never too sure of the truth of that. Given J's (SR71) maths it could be 170+ for sure??

Tim

OK, looks like we need group trip to Germany to answer this for once and for all

My Stock 2.8 Coupe can still show over 160MPH with 110K miles on the clock - and there are no hills in the Fens to gain an advantage on, so if you are saying that an S2 cannot, I might have to buy another 2.8 and sell the S2

Also, as stated before, I have been in a 1 year old stock ABY which was going past 165MPH indicated, when we had to brake as we were approaching other 'track users'. From the rate of change of speed, it would easily have reached 170MPH and VDO gauges are not so far out for it to have only been doing 150MPH....go figure

Cheers n

Si

[Ian Simmonds]

At the press launch of the S2 Estate in Germany the cars regularly hit 160mph according to the reporting at the time. Although we all know what Audi press launch cars can be like! Conservative on the quoted ponies, I think is probably the order of the day.

[SR71]

Si,

I think the point I was trying to make is that indicated speed doesn't mean anything.

Neither does a one way run.

I've seen 160mph on my speedo too but it was downhill. I doubt the car would have managed much more than 130mph the other way up the strip.

My bike speedo error is ~8%. At 100mph, in absolute terms the error is therefore...errr 8mph. But at 200mph, the error is ....errr 16mph.

Its pretty consistent against the GPS.

At the end of the day, knowing the C_d of the car and its frontal area, with a RR plot of max power, one can easily calculate the theoretical top speed of the vehicle.

My contention is that it is not possible for a 230hp S2 to hit 160mph.

If you happen to blast down your local drag strip and see your speedo indicating 160, there are two explanations:

1) Whatever your speedo is reading its wrong because your tyres are bald, the speedo is shagged, you're going downhill, there is a 20mph wind behind you and you're being generous with the parallax error...

2) Your car is making more than 230hp!

If, however, someone comes along and shows me a GPS read-out from a stock S2 reading 160mph, I'll eat my hat. Get that Etrex out!

I know they're pretty accurate as I've used them to back up the readings at the strip myself when on my 12R.

The notion that a 2.8 Coupe can also do 160mph is also beyond me. Sure there wasn't a bottle of NOS in the back? Or it wasn't a 3.8?

[HPmuirt]

The notion that a 2.8 Coupe can also do 160mph is also beyond me. Sure there wasn't a bottle of NOS in the back? Or it wasn't a 3.8?

Many fair points well made, which I have no reason to argue with

However, my 2.8 had a speedo accuracy of less than 5% and indicated 163 (virtualy max'd out but may have made 165). However, in the opposite direction a few days later (some tracks will let you do that ) AND with a roof rack with 2 bike racks (empty) on it, I hit 155MPH indicated before the wife complained....I **** you not. It did not get to 100MPH like an S2, but above that, I am not convinced the S2 is much faster. The 2.8 has the S2 bumper so same frontal area and drag (Cd of 0.31 IIRC).

Whilst I have not had my S2 on a 'track' yet, I find the same speedo accuracy as the 2.8, so having been in a stock S2 pulling past 165MPH, I believe that over 155MPH true is possible.

Again, I'll supply a stock S2 and the GPS, I vote we organise a jolly to Germany

Cheers n

Si

P.S. Book on the 2.8 usually varies around 147MPH

[SR71]

Dunno what the power output of the 2.8 Coupe is but I guess the 4WD losses you get in the S2 at that speed are huge...

I'm well up for a jolly to Germany/Continent.

The S2 is coming skiing with me at Xmas in the French Alps so a deserted autoroute at 3am might just be the place to find out whether she can reasonably exceed 70.

[HPmuirt]

Dunno what the power output of the 2.8 Coupe is but I guess the 4WD losses you get in the S2 at that speed are huge...

173BHP standard, but mine was running around 190 we think. Still not an S2 though

The S2 is coming skiing with me at Xmas in the French Alps so a deserted autoroute at 3am might just be the place to find out whether she can reasonably exceed 70.

Cool, I look forward to hearing the results Have you got a GPS?

Cheers n

Si

[Erikb]

I have seen 275 km/ph on my stock 3b I think I could even have hit the 280.But I have the wrong tyre sizes. Last time when I was in Germany I hit 260 kmph on my speedo that was 235 km/ph on my GPS. So I think mine is 10% inaccurate, so 275 will be 247-248 in real live.

[Martynf]

My Origin B2 has a GPS speedo as does my sat nav, both read identical speeds and when comparing that to the S2 speedo, the S2 speedo is 7% high on my car running with 215/40/17 tyres. I've seen an indicated 168 on mine which equates to 157 'true mph' this was completely flat out aint got no more left in it on a flat road.