Miles per gallon

C

campingstoveman

New Member
Gentlemen,

Last weekend my wife and I spent the weekend in Norfolk around Sheringham and Cromer, the company I work for treated myself and wife to a Murder Mystery evening on the Poppy line plus accomodation.
We drove up on the friday afternoon and returned on the Sunday evening and covered approximately 300 miles, I calculated that my Series 1 V8 returned around 25 mpg at a steady 50-55 mph which I was very pleased with but surprised as I thought she might be a little less frugal with the petrol.
The longest journey was one way of 104 miles.

Martin P
 
I recently did a 320 mile round trip from Edinburgh to Inverness and Elgin in my S2 V8 and she returned 27 mpg which I was well chuffed with :D

Dave
 
Around 23mpg for my Series 1 V8 - & that's over all sorts of driving - so I'm pretty pleased with the as well! :D
 
Got 31mpg from my 2200 auto going up and down to the RP6C National a few weeks ago.

27mpg from a V8 on tour is brilliant going. Nice one!
 
My 3500S returns 28-29 mpg on average on runs and managed a very presentable 23mpg with the twin wheeled club trailer on the back.
 
Gentlemen,

What I forgot to mention is my series 1 is an Auto which to me makes it all the better, I have learned to feather the throttle so when coming off roundabouts it stays in top thus not reving and using fuel.

Martin P
 
The Rover with a Borg Warner 3 speed automatic transmission will always use more fuel compared to the same car running a manual box, simply because of the losses involved within the transmission and torque converter.

When my Rover was running the original 3.5 litre V8, fuel consumption was typically in the range of 22 to 24mpg for country running. Sometimes it would see better, and an all time best of 27 mpg was achived on a 70mph run returning from Melbourne.

With a 4.6 litre engine now fitted, fuel consumption is consistantly better, falling within 25 to 29mpg, with 27 to 28mpg being the most common range.

To say that I am pleased is an understatement. :D :D

Ron.
 
hi gang!
i sort of checked my fuel consumption last week, i used a gallon and it went for 30 miles!
i was astonished!
mind you , that is pussy footing around for i have a misfire i think down to a dodgy electric fuel pump which means anything uphill or over 2000 revs and it'll cut out.
i also have a five speed box and its such a flexible engine you hardly ever have to change down!
it wasn;t the most scientific measurement in the world but it has to show the mpg isn't too bad!
 
SydneyRoverP6B said:
With a 4.6 litre engine now fitted, fuel consumption is consistantly better, falling within 25 to 29mpg, with 27 to 28mpg being the most common range.

To say that I am pleased is an understatement. :D :D

Ron.
Click to expand...

The 4.6 engine gives better fuel economy? Wow, that has really surprised me!

I know underpowered cars (cars with engines that are practically too small for the application) can swallow fuel just as bad (if not worse) than a car that has a more powerful engine, but I never envisaged a more powerful 4.6 engine drinking less fuel than a 'less-but-still-powerful' 3.5!
 
campingstoveman said:
I would suggest that as he has a bigger lump he can pull a higher gear and may have a different gearbox.

Martin P
Click to expand...

Yes, that is probably why! I wonder if it's a bored out P6 unit, a different block (or even a non-P6 Rover V8 engine).

An excellent reason (excuse) for putting in a 4.6 unit then!
 
darth sidious wrote,..
The 4.6 engine gives better fuel economy? Wow, that has really surprised me!

I know underpowered cars (cars with engines that are practically too small for the application) can swallow fuel just as bad (if not worse) than a car that has a more powerful engine, but I never envisaged a more powerful 4.6 engine drinking less fuel than a 'less-but-still-powerful' 3.5!
Click to expand...

Martin P wrote,..
I would sufggest that as he has a bigger lump he can pull a higher gear and may have a different gearbox.
Click to expand...

Hello Gents,

My 4.6 is a cross bolted Range Rover engine, circa 2002, custom built and fueled by twin SU HIF6 carburettors. The 3 speed automatic transmission runs the same ratios as per the original specification, so in this regard it is no different to any other 3500 P6B.

To say that I was surprised by the fuel consumption is an understatement. The 4.6 will consume over 30% more air per unit time compared to the 3.5, so naturally it will also require more fuel, but what it then does with that mixture is the key. Having the right air/fuel ratio is very important when it comes to efficiency and thus developing maximum power and torque.

Ron.
 
Hi All, the MPG figures mentioned in this thread for the V8's are really very good considering I'm getting only 16 MPG out of my 3500 Auto at the moment (that's because the HIF6 Carbs need rebuilding as they are very worn). I do however manage to get 30 MPG out of the 2000TC which I'm very pleased with. Not bad for an old heavy car with a four speed box...

Mick
 
Rovernutter said:
Not bad for an old heavy car with a four speed box...

Mick
Click to expand...

I do wonder why many people consider the P6 to be a heavy car.

My Audi A6 is 600Kg heavier than the P6.

My brother used to get 18ph from his series one P6B Auto, but then he did drive it like a twit (just checked to see that I used the correct vowel in that word :shock: )

Richard
 
i used to get somewhere from 12-15 out of my first auto3500.
i could excuse it with saying it wasn't set up right but no, it was due to me ragging it around!
but i only ever used it on weekends so why not!
 
I used to run a 3500 S with a 5 speed SD1 box.

On a touring holiday my late father managed an all time best of 35 mpg.

I never matched that.
 
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