What MPG/Mileage do you get in your car?

forgotmyname

epninety wrote: »

Exactly. you have to know any two values simultaneously to calculate the third. Peak torque and peak power don't usually occur at the same rpm, though it's not impossible. So from your numbers, you are making around 88bhp at peak torque, but only around 145lb-ft at max power, assuming that peak lies close to the rev limit.

Either that, or you are one of the hundreds of lucky petrolheads on the internet who own cars that defy the laws of physics :rotfl:

My car defies all sorts of laws It changes colour daily depending on the acidity if the rain. The algea growing all over it changes colour to match

As standard its 128bhp at 3800rpm. Is that the figure you need? Or max torque at 4800rpm?

The issue is mine has a few tweaks. so produces more power and torque at the same revs. How does that mess up the figures? Or does it balance out?

Im too old to learn new stuff

derrick

feduptwo wrote: »

Hi,

What return are you getting for your hard earned cash in petrol. I put in £40 to my 2001 zetec 1.6 Focus auto and I get 260 miles. I am not sure if this is the right amount I should be getting or not, nor do I know what MPG that is. I filled up at 31 ltr at £128.9

What do you guys get MPG and what sort of miles do you expect from £20 or £40 petrol.

I hope I can gauge if my car is not performing well, it’s hurting my walletL

Thank you.

No wonder it is hurting your wallet,that must be the most expensive petrol in the world:D

.

Martyn_H

feduptwo wrote: »

Hi,

What return are you getting for your hard earned cash in petrol. I put in £40 to my 2001 zetec 1.6 Focus auto and I get 260 miles. I am not sure if this is the right amount I should be getting or not, nor do I know what MPG that is. I filled up at 31 ltr at £128.9

What do you guys get MPG and what sort of miles do you expect from £20 or £40 petrol.

I hope I can gauge if my car is not performing well, it’s hurting my wallet L

Thank you.

2004 Focus 1.6 petrol, 400-420 miles motorway driving on a full tank approx £60. What that equates to in mpg I'm not sure.

Skulls

My 2012 Citroen C1 has averaged 63 mpg over its first 10,000 miles. Mainly short journeys 2.3 miles to work and 17 miles school run. £0 road fund tax and only £150 fully comp insurance.

My last car was another C1 and it cost me just over £1/day in devaluation(£400/year)

I've had bigger cars but none have been as much fun as my C1's, they are like go-karts on the road. It does 85mph in 3rd! No more in 4th and 5th!

thefishdude

i have an old 2002 1.9dci megane scenic. recently done 400 miles mix of motorway towna nd country roads and averaged 50mpg.

normally around town its abot 35-40 i would say and cruising on a motorway i have reached 63mpg over a 100mile stretch that was doing about 60-65mpg i dont go any quicker lol. i have checked the on board computer agaisnt the brim to brim methos and difference is only about 1mpg.

addyboy1982

You can only properly calculate when you do brim-to-brim fill ups - sticking £20 in and counting the miles is pointless as you may use more than £20 of fuel before you top up another £20.

My Laguna 2.0dCi 130bhp has averaged 49.6mpg over 29000 miles. It does 45.7mpg in winter and 52.5mpg in summer.

newfoundglory

I have a ford ka with a 1.3l duratec engine. Doing short journeys of approx 5 miles, I get between 23 and 24 mpg.

forgotmyname

Except you probably dont. because your figures are flawed.

Or you leave it running overnight. Or all day even when its parked.

Another thought.. Do you have 3 tons of additional stereo equipment added?

steve-L

It does seem improbable....or something is REALLY badly wrong...

djgandy

50mpg @ 100mph? Extremely unlikely considering there is 4x the amount of air resistance alone at this speed vs 50mph. Maybe down hill you'll get that.

torque/hp/rpm is an equation along the entire rpm range, there is not much point just looking at a single point so text figures are generally not much use unless given along a range e.g. 200lb/ft @ 1500-4500 RPM.

See hxxp://images.thecarconnection.com/lrg/0609-a-2007-bmw-335i-dyno-chart-jpg_100204083_l.jpg

Torque is the blue line and the right hand side. If you take any point on that graph and do the equation (torque * rpm) / 5252 you will get horsepower (red line). Here are a few I have done.

1000 rpm @ 140 lb/ft = 26.66 hp
2000 rpm @ 220 lb/ft = 83.78 hp
3000 rpm @ 230 lb/ft = 131.38 hp
4000 rpm @ 225 lb/ft = 171.36 hp

Even though torque is going down towards the end, RPM is increasing at a higher ratio than torque is declining offsetting this loss.

An easier way to think of it might be using some common day activity. Say something like lifting bricks for block paving.

One person may be able to lift 10 bricks at a time (high force/torque), but it takes them 5 seconds (low rate/rpm) to move them 1 foot . Another person may only be able to lift 4 bricks at a time (low force/torque), but they only take 1 second to move them 1 foot (high rate/rpm). Therefore the person lifting fewer bricks at a time has a higher output which equates to more work done (power).