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10th December 2018, 18:06 | #31 | |
I really should get out more.......
75 CDT SE 160 Saloon Join Date: May 2017
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I think we were discussing what can be got on a run over a reasonable distance. Instantaneous figures should be ignored of course and I would also be a little sceptical of any onboard systems predicting mileage but when a brim to brim test is done over a several hundred mile run then you have to give it a little credance. I don't think anyone is claiming that circa 60mpg is possible with day to day driving but i think you can get close on a single long run if you catch the traffic right however i'll happily concede that mid to high 40's should be possible on average.
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Glutton for punishment --- Previously ... 2.6 SD1 x 2, 3.5 SD1, 820S, 820Si x2, 216 Gsi, 220T saloon, 414, 45 1.4 x2 and now a Cowley 75 CDT |
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10th December 2018, 18:41 | #32 |
Avid contributor
Rover 75 tourers(4)400turs(3 Join Date: Nov 2016
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M.p.g.
Run 2 x 75 auto's & 1 manual 75 tourers as everyday cars 1 auto on 142,000 miles which gives around 40 mpg, other auto 204,000 miles (131 bhp facelift model) gives around 37 mpg & manual 206,000 miles gives 48/50 mpg. All are diesel tourers well serviced but not driven on a way to give optimum fuel econemy, and this is over a period of ownership since 2007.I reckon it may on occasions be possible to get more but who cares just enjoy the cars everyday.
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10th December 2018, 20:39 | #33 | |
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The reason I initiated the thread in the first place was to share my somewhat geeky achievements in an effort to make an otherwise tedious sunday afternoon drive more engaging. I find it somewhat bemusing that some people on here have basically said that the result of my three hour experiment is actually impossible, without trying it themselves, or considering the factors involved with whether one of our cars can greatly exceed their published MPG figures when driven in favourable conditions. I ain't lying! So if you are of a mind to compare figures between cars and journeys, to make it a fair-ish test, can anybody else better an indicated 60.1 MPG over 175 miles? I intend to, even though my car, apparently, can't do any better than 48 MPG |
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10th December 2018, 20:58 | #34 | |
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10th December 2018, 21:57 | #35 |
This is my second home
Rover 75 cdt club + Rover 2.5 KV6 Conni SE Join Date: May 2008
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I don’t know if other people do this....but in certain driving conditions, I have found no need to go over 2000 rpm when changing up. I do under certain road and load conditions, pull away in first gear,go up to 2500 rpm, and change into third gear, and at just over 2200 rpm, change up to top gear. Whether this helps mpg I do not know, but it is nice and smooth.
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10th December 2018, 22:16 | #36 |
Posted a thing or two
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I regularly take one or other of my fleet on a round trip of some 580 miles, so I've a good idea of what the fuel consumption should be like. The majority of this would be on motorway/main roads on which I can cruise at an indicated 80-85mph, bar a couple of short stretches restricted to 60mph. About 200 miles of it is on minor roads which can often be rather twisty or narrow, on which there's often a need to drop a gear and floor it in order to bypass slow vehicles. These trips always involve at least one fill-up.
In my diesel with a manual gearbox, the range can be anywhere from 580 to 650 miles, depending on the time of year and how much accelerating/braking I've had to do. I don't think it has ever gone below 560 miles to a tank, even after a series of unusually short trips. The highest I ever got was 732 miles on one fill - however, that involved crawling along the west coast of Ireland at 40-45mph for a couple of days. I wouldn't recommend it! Interestingly, another diesel of ours with the same power output and transmission as the one I usually drive is always about 10% thirstier, even when we swap cars and it has the same driver and usage patterns for a while. Still haven't worked out why, but I'll get be getting the wheels aligned shortly and it'll be interesting to see if that makes a difference.
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11th December 2018, 06:30 | #37 | |
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11th December 2018, 19:35 | #38 |
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Rover 75 2.5 Connoisseur SE,Chrysler 300C,124 Spider, Daytona 955i,Honda XL250 & Royal Enfield 650GT Join Date: Feb 2008
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If I wanted to get 60 mpg, I would have got something like a Micra, or worse.
Based on around 14,000 miles, I get 39.6 mpg for my diesel auto, which is a bonus over the V6 manual which is 27.34 mpg. However, the V6 is nicer to drive, and is also better at overtaking slow vehicles. This is such as a Tata Nano, or even cars, built for better performance characteristics, but driven within the performance envelope of such cars.
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11th December 2018, 19:42 | #39 | |
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11th December 2018, 22:05 | #40 |
Posted a thing or two
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i've not been a ZT owner for a good few years but managed to get over 58 mpg after travelling from the north east of England to oxford to pick up a full leather contemporary interior as well as another long motorway trip. from the fuel light coming on and filling to the brim and back to the fuel light coming back on again i managed 705 miles.
that was after a Marinabrian 160 remap, a new Bosche MAF and a service. i never went past the 70mph mark and the roads were at most points quite clear. 14.5 around the doors and 29 mpg on a run in the Jaguar s-type R shows how frugal the diesel 75 / ZT's can be. 2012-09-19 21.26.20.jpg
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