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Old 1st January 2019, 10:52   #1
m2n
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Rover 75 2004 Contemporary SE 2.5 Auto

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Default Mpg..

Travelled from Preston to Oxford ... motorway all the way and my Eve done 39.8 mpg, downside being local roads only giving me 25 mpg.....
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Eve was born on: Tuesday 14th September 2004 @ 07.54.23
Date of first Registration: Friday 24th September 2004
She was the: 103,715th 75 to run off production line, out of 112,381
She was the: 382nd 75 2.5 V6 Contemporary SE to be made out of 686
She was the: 1,415th 75 in Firefrost Red (code CEV) to be made out of 2,089 Firefrost Red 75's
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Old 2nd January 2019, 11:00   #2
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Then take 10 percent off that it be your true reading mine done 49.6 mpg but in true life it probs be 45 max if not less even in an brim to brim it's still not give you an true reading and that in the motorways round town you probs be looking at half that lol in mine with an mong box
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Old 2nd January 2019, 17:12   #3
m2n
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This is true, but nice high figures though
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To have and not need, than need and not have.
Eve was born on: Tuesday 14th September 2004 @ 07.54.23
Date of first Registration: Friday 24th September 2004
She was the: 103,715th 75 to run off production line, out of 112,381
She was the: 382nd 75 2.5 V6 Contemporary SE to be made out of 686
She was the: 1,415th 75 in Firefrost Red (code CEV) to be made out of 2,089 Firefrost Red 75's
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Old 4th January 2019, 23:11   #4
Mattyboy
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2ltr engine, did you swap it from the 2.5ltr? I'm reading that sometimes the bigger engine does better mpg. Perhaps due to lower revs or higher torque?
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Old 5th January 2019, 07:28   #5
Dorchester2
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Rover 75 Saloon V6 2.5 1999 - Rover 25 1.4 2002 - Rover 214i cab 1994 - Rover P5b coupe 1968

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Quote:
Originally Posted by Mattyboy View Post
2ltr engine, did you swap it from the 2.5ltr? I'm reading that sometimes the bigger engine does better mpg. Perhaps due to lower revs or higher torque?
When I was fuelling up with petrol, no more than 30 mpg and I take my V6 2.5 auto mainly for medium and long journeys.
Now with full E85 (ethanol - octane grade = 106) only 24 mpg (but it's the equivalent of the 30 above, 20% of over consumption with E85 is considered as normal).
But I'm always driving in sport mode (higher revs).

But talking of torque, with new VIS motors in full order, derestricted air intake (trumpet gone & 4 holes drilled in the low air box) & full MIJ ss exhaust (with derestricted back box), it's a very dream: responsive, powerful, fast. An amazing bliss and nearly 20 years next 1st of July!
I don't want at all to swap my 75 with any other one!
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Rover 75 V6 2.5 Auto Connie born 1 July 1999, 24 kOhms resistor, 10 kOhms manual starter, full E85, modified airbox, full derestricted SS exhaust line, power & torque remap -> 202 bhp
  • This vehicle was the 7,517th 75 to run off the production line, out of 112,381
  • This vehicle was the 1,190th 75 2.5 V6 Contemporary to be made out of 8,214
  • This vehicle was the 2,032nd 75 in Atlantic Blue Pearlescent (code: JEY) to be made out of 2,572 Atlantic Blue Pearlescent 75s

Last edited by Dorchester2; 5th January 2019 at 07:57..
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Old 5th January 2019, 13:25   #6
Mattyboy
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Default Dorchester

Thanks for the reply but I meant does the 2.5ltr actually return better fuel economy than the 2ltr. I'm considering a 2.5ltr auto but the fuel economy can't be great although the drive will be smooth.

I'm hearing that they aren't that bad & sometimes better than the 2ltr engines. My current 1.8T gives mid thirties but it manual. Lovely drive & nice car. Wish I could post a photo but the forum is so old fashioned in layout!
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Old 5th January 2019, 16:38   #7
Dorchester2
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Quote:
Originally Posted by Mattyboy View Post
Thanks for the reply but I meant does the 2.5ltr actually return better fuel economy than the 2ltr. I'm considering a 2.5ltr auto but the fuel economy can't be great although the drive will be smooth.

I'm hearing that they aren't that bad & sometimes better than the 2ltr engines. My current 1.8T gives mid thirties but it manual. Lovely drive & nice car. Wish I could post a photo but the forum is so old fashioned in layout!

As I've only a 2.5 I can't tell you the difference but I was told that the 2.0 was weaker and less powerful given the weight of the car and charge. Less power but mpg likely very close to mine.
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Rover 75 V6 2.5 Auto Connie born 1 July 1999, 24 kOhms resistor, 10 kOhms manual starter, full E85, modified airbox, full derestricted SS exhaust line, power & torque remap -> 202 bhp
  • This vehicle was the 7,517th 75 to run off the production line, out of 112,381
  • This vehicle was the 1,190th 75 2.5 V6 Contemporary to be made out of 8,214
  • This vehicle was the 2,032nd 75 in Atlantic Blue Pearlescent (code: JEY) to be made out of 2,572 Atlantic Blue Pearlescent 75s
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Old 5th January 2019, 16:41   #8
Dorchester2
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Rover 75 Saloon V6 2.5 1999 - Rover 25 1.4 2002 - Rover 214i cab 1994 - Rover P5b coupe 1968

Join Date: Sep 2017
Location: Bioule. South West of France.
Posts: 1,643
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Thanked 385 Times in 223 Posts
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Quote:
Originally Posted by Mattyboy View Post
Thanks for the reply but I meant does the 2.5ltr actually return better fuel economy than the 2ltr. I'm considering a 2.5ltr auto but the fuel economy can't be great although the drive will be smooth.

I'm hearing that they aren't that bad & sometimes better than the 2ltr engines. My current 1.8T gives mid thirties but it manual. Lovely drive & nice car. Wish I could post a photo but the forum is so old fashioned in layout!

As I've only a 2.5 I can't tell you the difference but I was told that the 2.0 was weaker and less powerful given the weight of the car and charge. Less power but the mpg likely very close to mine, nearly same engine but restricted.
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Rover 75 V6 2.5 Auto Connie born 1 July 1999, 24 kOhms resistor, 10 kOhms manual starter, full E85, modified airbox, full derestricted SS exhaust line, power & torque remap -> 202 bhp
  • This vehicle was the 7,517th 75 to run off the production line, out of 112,381
  • This vehicle was the 1,190th 75 2.5 V6 Contemporary to be made out of 8,214
  • This vehicle was the 2,032nd 75 in Atlantic Blue Pearlescent (code: JEY) to be made out of 2,572 Atlantic Blue Pearlescent 75s
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Old 5th January 2019, 20:38   #9
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Just for comparison, I have a 1999 2ltr auto and keep a track of my mileage brim to brim. Over the 3 years & 32k of mostly a-road commuting in this one the figures for a tank are:
worst - 25.0 (last winter in the snow)
average - 29.7
best - 34.9 (summer touring)
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Old 6th January 2019, 07:01   #10
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In contrast my diesel estate averages 46 mpg, bit more in the summer, bit less in winter. That's normal driving not pussy footing about trying to up mpg figures. Got a driver awareness course tomorrow, was clocked at 68 mph pulling our caravan going uphill on the M6.
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