|
||
|
12th February 2019, 14:00 | #11 |
This is my second home
Rover 75 cdt club + Rover 2.5 KV6 Conni SE Join Date: May 2008
Location: Birmingham
Posts: 11,356
Thanks: 6,587
Thanked 2,262 Times in 1,729 Posts
|
Your photo reminded me of the time my then girl friend, now my wife, we’re going down to the smoke on the M1 in my 100e van, XOM 611. We were cruising along at a steady 60 mph, and suddenly a red E type shot past well over 100 mph, and another went past going around the same speed. My girl friend said ‘can we have one of them’? You can guess the answer.
__________________
Great Barr, Birmingham. |
12th February 2019, 14:22 | #12 | |
Senior Citizen
Rover 75 2.5 Connoisseur SE,Chrysler 300C,124 Spider, Daytona 955i,Honda XL250 & Royal Enfield 650GT Join Date: Feb 2008
Location: The Kingdom of Wessex
Posts: 6,976
Thanks: 2,391
Thanked 2,685 Times in 1,686 Posts
|
Quote:
I had both as company cars and I remember that the Sierra didn't like crosswinds on the motorway.
__________________
Let the good times roll............ |
|
12th February 2019, 17:18 | #13 |
This is my second home
Rover75 and Mreg Corsa. Join Date: Nov 2006
Location: Sumweer onat mote o'dust (Sagin)
Posts: 21,751
Thanks: 341
Thanked 3,660 Times in 2,924 Posts
|
I first read about drag coefficient in Autocar magazine in the 60s. It was included in the specs and data they gave in car reviews. You also got details like mph/1000 rpm in each gear, including reverse. As I recall, the maximum speed of an E-type in second gear was around 70mph.
TC |
12th February 2019, 19:27 | #14 |
This is my second home
R75 Saloon. Join Date: Feb 2009
Location: France/or Devon.
Posts: 14,003
Thanks: 3,851
Thanked 2,167 Times in 1,816 Posts
|
I can clearly remember in the traffic light grand prixs that I never had to go above 2,000 rpm in any gear to make the cars around me become small dots in the rear view mirror.
This low drag thing. Volvo estate cars started to compete in the saloon car racing but I think they were banned because they had a great advantage due to the much smaller drag co-efficient. It was because their rear end was flat.-- |
12th February 2019, 20:11 | #15 | |
Posted a thing or two
75 Conn CDT Tourer, 75 Conn SE V6, 75 Conn V6, 75 Conn CDTi Tourer, ZS 180 Join Date: Jan 2014
Location: Devon
Posts: 1,982
Thanks: 1,287
Thanked 963 Times in 534 Posts
|
Quote:
Does anyone else remember the Audi 'Procon 10' system ?? A very ingenious progressive deformation system that operated in a heavy front end crash, think it used steel cables around the engine to pull the steering column forward & away from the driver (....this is all from memory again though, so could be completely wrong and dreamt it...)
__________________
|
|
12th February 2019, 21:03 | #16 |
This is my second home
Rover 75CDT, Jaguar XF-S 3.0V6, V'xhall Omega V6 Estate, Twintop 1.8VVT, Astra Estate and Corsa 1.2 Join Date: Dec 2007
Location: Suffolk
Posts: 7,079
Thanks: 283
Thanked 624 Times in 440 Posts
|
The 2019 Mecredes CLS has a drag coefficient value of 0.26. It's quite an achievement really.
|
12th February 2019, 21:22 | #17 | |
This is my second home
75 Contemporary SE Mk II 2004 Man. Sal. CDTi 135ps, FBH on red diesel, WinCE6 DD Join Date: May 2010
Location: Leeds
Posts: 17,273
Thanks: 2,160
Thanked 2,061 Times in 1,586 Posts
|
Quote:
With the engine under panel in place, bet it becomes much worse without it. I thought I remembered the Saab 99 having a figure around 0.32?
__________________
Harry How To's and items I offer for free, or just to cover the cost of my expenses... http://www.the75andztclub.co.uk/foru...40#post1764540 Fix a poor handbrake; DIY ABS diagnostic unit; Loan of the spanner needed to change the CDT belts; free OBD diagnostics +MAF; Correct Bosch MAF cheap; DVB-T install in an ex-hi-line system; DD install with a HK amp; FBH servicing. I've taken a vow of poverty. To annoy me, send money. |
|
13th February 2019, 08:05 | #18 |
Gets stuck in
Rover 75 2.5 V6 in Wedgwood Blue Join Date: Dec 2015
Location: Felbridge, East Grinstead
Posts: 982
Thanks: 250
Thanked 294 Times in 206 Posts
|
Of course with too little drag what you've got is a wing, which isn't good news for sticking to the road.
__________________
Conformity is not morality. Consensus is not truth. |
13th February 2019, 09:09 | #19 | |
This is my second home
Rover 75CDT, Jaguar XF-S 3.0V6, V'xhall Omega V6 Estate, Twintop 1.8VVT, Astra Estate and Corsa 1.2 Join Date: Dec 2007
Location: Suffolk
Posts: 7,079
Thanks: 283
Thanked 624 Times in 440 Posts
|
Quote:
Not at all. Drag works against forward movement and has no impact on upward/downward forces acting on the object. The Mercedes CLS is a case in point - a super heavy car, with a large downward force when moving, but with a drag coefficient of only 0.26. |
|
13th February 2019, 11:03 | #20 |
Gets stuck in
Rover 75 Connie SE 2.5 V6 Auto Join Date: Aug 2015
Location: Stevenage
Posts: 618
Thanks: 619
Thanked 253 Times in 182 Posts
|
Thanks for all the comments and info on this.
Seems like the (pre-facelift) 75 at 0.29 is pretty aerodynamic in comparison to some. Well done RichardW ! I wonder if the change of styling for the facelift model made much difference? Cheers all John
__________________
. My 2.5 V6 Connoisseur SE Auto 75 is the • 20,516th 75 to be made out of 112,381 • 787th 2.5 V6 Connoisseur SE to be made out of 3,671 • 1,248th Wedgwood Blue Metallic (code: JBH) to be made out of 7,515 code JBH 75's |
Thread Tools | |
Display Modes | |
|
|