BMW 1-Series Forum (F20) 135i - 1Addicts.com > Second Generation 1 Series Forum > 2012 BMW 1-Series Sporthatch (F20) Discussion > 116i economy
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      12-13-2013, 04:17 AM   #1
digitall.rebel
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116i economy

Hi everyone. I'm considering a 316i sport (with the same engine as 116i) but there aren't that many 316i owners on the F30 thread. For the same price I can have a 118d m sport with leather interior so that is also an option.

I would appreciate if the 116i owners can share what mpg (please specify if uk gallon or us gallon) they are getting.
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      12-13-2013, 04:43 AM   #2
Callthecops
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My 118i has almost the same mpg as the 116i.
After 16.000 km it's 6.9l/100km
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      12-13-2013, 05:45 AM   #3
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Quote:
Originally Posted by Callthecops View Post
My 118i has almost the same mpg as the 116i.
After 16.000 km it's 6.9l/100km
Same here, including track driving.
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      12-13-2013, 06:09 AM   #4
AusF20/F48
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The 316i will have a slightly higher L/100 average than the 116i as there is a weight difference between the 1er and 3er
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      12-13-2013, 06:14 AM   #5
AusF20/F48
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There is very little difference in the width between the 116i and 316i
The 316i has slightly more adult leg room in the rear
I went for the 1er F20 as it was far more practical than the 3er sedan.
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      12-13-2013, 06:47 AM   #6
ovekvam
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Quote:
Originally Posted by AusF20 View Post
The 316i will have a slightly higher L/100 average than the 116i as there is a weight difference between the 1er and 3er
But the 316i has less aero drag. If you have a high average speed, I am pretty sure it would beat the F20.
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      12-13-2013, 08:56 AM   #7
vladberca
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I would take an M Sport 1er than a 316i Sport
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      12-13-2013, 09:21 AM   #8
ovekvam
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Originally Posted by vladberca View Post
I would take an M Sport 1er than a 316i Sport
Definitely. Me too. The 3 series is simply too large for my taste, and I like the M Sport package.
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      12-13-2013, 11:04 AM   #9
Vervain
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Quote:
Originally Posted by ovekvam View Post
But the 316i has less aero drag. If you have a high average speed, I am pretty sure it would beat the F20.
That's very interesting! lol
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      12-13-2013, 04:36 PM   #10
digitall.rebel
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Quote:
Originally Posted by Callthecops View Post
My 118i has almost the same mpg as the 116i.
After 16.000 km it's 6.9l/100km
That's really good. If I've done maths correct it works out as 40mpg uk and the advertised is 46. Do you do mainly motorway or city driving?
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      12-13-2013, 04:37 PM   #11
digitall.rebel
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Quote:
Originally Posted by vladberca View Post
I would take an M Sport 1er than a 316i Sport
Very tempted with the m sport styling but have always wanted a 3 series
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      12-13-2013, 06:55 PM   #12
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I normally get between 38-40 UK mpg from my 116i SE, town and A roads.
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      12-13-2013, 10:43 PM   #13
AusF20/F48
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Quote:
Originally Posted by ovekvam View Post
But the 316i has less aero drag. If you have a high average speed, I am pretty sure it would beat the F20.

Interesting point
Are we talking drag coefficients in Norway at -20 (cold) or +38 (hot) in Australia as the air density also has a lot to do with drag coefficients
Personally, I do not think there would be a great difference just on drag coefficients. Weight would have a greater effect (kw per ton)
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      12-14-2013, 12:56 AM   #14
ovekvam
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Quote:
Originally Posted by AusF20 View Post
Interesting point
Are we talking drag coefficients in Norway at -20 (cold) or +38 (hot) in Australia as the air density also has a lot to do with drag coefficients
Personally, I do not think there would be a great difference just on drag coefficients. Weight would have a greater effect (kw per ton)
There is more drag at low temperatures, but the drag coefficient stays the same. And it is significantly lower for the 3-series. The F20 has more drag than an E30, mostly due to larger frontal area.

At low speeds, the aero drag does not matter much. As you say, weight is the important factor for stop and go driving. For high speed cruising however, the aero drag is very important, and weight does not matter much.
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      12-14-2013, 04:36 AM   #15
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Quote:
Originally Posted by ovekvam View Post
There is more drag at low temperatures, but the drag coefficient stays the same. And it is significantly lower for the 3-series. The F20 has more drag than an E30, mostly due to larger frontal area.

At low speeds, the aero drag does not matter much. As you say, weight is the important factor for stop and go driving. For high speed cruising however, the aero drag is very important, and weight does not matter much.
I gather we are talking about drag Co at legal road speeds less than 100KPH not on the race track or autobahn
Power to weight is still a major factor as driving motion is measured against resistance of road surface, air density (drag) and velocity against torque // KW per ton. Unless you are going downhill.

I am interested to hear your opinion.
Do you think the Drag difference between the 3er and 1er at 100kph is great enough to discount the difference in their power to weight ratios as a factor in fuel consumption.
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      12-14-2013, 05:18 AM   #16
ovekvam
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Quote:
Originally Posted by AusF20 View Post
I gather we are talking about drag Co at legal road speeds less than 100KPH not on the race track or autobahn
Power to weight is still a major factor as driving motion is measured against resistance of road surface, air density (drag) and velocity against torque // KW per ton. Unless you are going downhill.

I am interested to hear your opinion.
Do you think the Drag difference between the 3er and 1er at 100kph is great enough to discount the difference in their power to weight ratios as a factor in fuel consumption.
I haven't done any calculations here now, but I would guess that a 116i and a 316i would have approximately the same consumption at 100 km/h. At lower speeds, the 116i would be less thirsty, while the 316i would be less thirsty at higher speed. It also depends on how much you accelerate. Keeping a constant speed on a flat road would benefit the 316i, while hill climbing and changing speed would suit the 116i.

In general, large engines are better suited for high speed driving, and small engines work well for low speed urban driving. Our 116i was not very happy at 200 km/h on the Autobahn, and I guess an M135i would be very thirsty in the city.
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      12-14-2013, 10:54 AM   #17
Callthecops
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Quote:
Originally Posted by billy.213 View Post
That's really good. If I've done maths correct it works out as 40mpg uk and the advertised is 46. Do you do mainly motorway or city driving?

When I drive to work I can choose between the highway (40min) or B-roads (55min)
90% of the time it's the winding B-road route that runs through two small cities.
The fun factor is more important to me than the fastest way to get to my destination.
I try to avoid highways because they are utterly boring.
Except when it's snowing then it's the safest way to get to my job.
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      12-15-2013, 08:46 AM   #18
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I get between 29-31 mpg on average from my 116i. Mainly short journeys to work (3 miles away from home) driving round town and A roads. On the motorway it averages about 37mpg. Im quite dissapointed with the fuel consumption as other 116i owners say they can get more. Not great for me as I dont do much motorway driving
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      12-15-2013, 09:19 AM   #19
ovekvam
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The colds starts really hurt the consumption statistics. The longer journeys are better if you want nice figures. I recommend using a bicycle for short trips.
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      12-15-2013, 02:41 PM   #20
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Quote:
Originally Posted by ovekvam View Post
I haven't done any calculations here now, but I would guess that a 116i and a 316i would have approximately the same consumption at 100 km/h. At lower speeds, the 116i would be less thirsty, while the 316i would be less thirsty at higher speed. It also depends on how much you accelerate. Keeping a constant speed on a flat road would benefit the 316i, while hill climbing and changing speed would suit the 116i.

In general, large engines are better suited for high speed driving, and small engines work well for low speed urban driving. Our 116i was not very happy at 200 km/h on the Autobahn, and I guess an M135i would be very thirsty in the city.
Good points.

We've had similar experiences here in the UK with the E87 and E90 1 & 3-series smaller diesels. One particular comment from users either with both, or moving to the 1-series, noticing the mpg is not as good as expected from the 1-series at motorway speeds.

HighlandPete
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      12-15-2013, 03:05 PM   #21
logiclee
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Looking at the figures over on another forum the auto version is getting higher MPG on the motorway at higher speeds. Probably due to the tall 8th gear.

Our 116i auto gets 36mpg around town but 50mpg is possible with cruise set at 75mph on longer runs.

Cold weather really hurts economy though, especially on short runs.

Cheers
Lee
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      12-15-2013, 03:33 PM   #22
ovekvam
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Quote:
Originally Posted by logiclee View Post
Cold weather really hurts economy though, especially on short runs.
My experience is that I get very nice consumption figures on long trips on cold days. The aero drag is slightly higher, but the engine runs better as well, since the air is denser.
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