F31 340i Fuel Economy
Discussion
drdino said:
Mind if I jump in on the thread as well? Got a similar dilemma, I do around 10k a year so don't really need a diesel. My commute is 25+25 miles each day, with v. light to moderate (on the off day) traffic. Mix of 40/50/NSL road, currently get 37-38mpg on my 308 GTi. Would around 30-32 mpg be realistic, or would I be looking at below 30s with a 340i? Don't care about mileage on a hoon, just the "daily" bit...
I can only speak of my own real-world experience where I commute 20 miles each way with exactly half of that on the M4. I'm too old/busy to be bothered with going for a "hoon" but I do like to use the rev range if I'm on rural roads (or what's the point in buying this car?). I get 26ish mpg.I'm sure someone will be along shortly to tell you you'll get 39mpg though.
DoubleSix said:
I can only speak of my own real-world experience where I commute 20 miles each way with exactly half of that on the M4. I'm too old/busy to be bothered with going for a "hoon" but I do like to use the rev range if I'm on rural roads (or what's the point in buying this car?). I get 26ish mpg.
I'm sure someone will be along shortly to tell you you'll get 39mpg though.
Mind if I wait for the guy after this one who will tell me my fuel levels will increase after each trip? I'm sure someone will be along shortly to tell you you'll get 39mpg though.
Edited by drdino on Monday 20th January 20:39
t about fuel consumption, It really is a fantastic awesome engine (and car).12TS said:
I think it depends on how you decide the truth. Most people like to report the most optimistic mpg IMHO, which is the onboard trip.
On long motorway journeys with the benefit of average speed cameras for lots of it (think M1/M6) then 40+mpg is possible according to my trip. The effect of speed can also be easily observed and upping speed from low 70s to low 80s will drop it by quite a few mpg. Probably 5mpg. You can also drop it an mpg or so if you switch on the a/c.
I really only believe brim to brim figures though, a tankful picks up all the other stuff that happens in daily life. In my 15000 miles from new I'm getting an honest 32 to 34 mpg with mostly motorway driving (LTA speed is about 50mph). That's running on 95RON, it gets a bit better with 98RON (two mpg at most)
I've yet to drop below 29mpg on a tankful, that involved town driving which isn't its forte.
It's much better than my old scoob which struggled to get over 25mpg, and that's with another 500kg and 120bhp onboard.
On long motorway journeys with the benefit of average speed cameras for lots of it (think M1/M6) then 40+mpg is possible according to my trip. The effect of speed can also be easily observed and upping speed from low 70s to low 80s will drop it by quite a few mpg. Probably 5mpg. You can also drop it an mpg or so if you switch on the a/c.
I really only believe brim to brim figures though, a tankful picks up all the other stuff that happens in daily life. In my 15000 miles from new I'm getting an honest 32 to 34 mpg with mostly motorway driving (LTA speed is about 50mph). That's running on 95RON, it gets a bit better with 98RON (two mpg at most)
I've yet to drop below 29mpg on a tankful, that involved town driving which isn't its forte.
It's much better than my old scoob which struggled to get over 25mpg, and that's with another 500kg and 120bhp onboard.
drdino said:
DoubleSix said:
I can only speak of my own real-world experience where I commute 20 miles each way with exactly half of that on the M4. I'm too old/busy to be bothered with going for a "hoon" but I do like to use the rev range if I'm on rural roads (or what's the point in buying this car?). I get 26ish mpg.
I'm sure someone will be along shortly to tell you you'll get 39mpg though.
Mind if I wait for the guy after this one who will tell me my fuel levels will increase after each trip? I'm sure someone will be along shortly to tell you you'll get 39mpg though.
Edited by drdino on Monday 20th January 20:39
My apologies have no bounds.
b14 said:
drdino said:
DoubleSix said:
I can only speak of my own real-world experience where I commute 20 miles each way with exactly half of that on the M4. I'm too old/busy to be bothered with going for a "hoon" but I do like to use the rev range if I'm on rural roads (or what's the point in buying this car?). I get 26ish mpg.
I'm sure someone will be along shortly to tell you you'll get 39mpg though.
Mind if I wait for the guy after this one who will tell me my fuel levels will increase after each trip? I'm sure someone will be along shortly to tell you you'll get 39mpg though.
Edited by drdino on Monday 20th January 20:39
My apologies have no bounds.
It's of no use to the OP or anyone else reading the thread really as it doesn't reflect how people will likely use the car.
Apology accepted
I wish I could get a 24h testdrive on one (or even a rental) to see how it would fare, oh well!I did 1000 miles in a 340i when my 335i was in for some work.
The 340i averaged 25mpg where the 335i did 27mpg. The 335i was a manual.
The B58 is a cracking engine. Broad spread of power and a nice soundtrack. On a steady motorway run at 70, I'm sure you'd get high 30's. Realistically, i think 28-32mpg is where they tend to settle.
That being said, I currently own an Alpina D3, and I wouldn't swap it for a 340i.
The 340i averaged 25mpg where the 335i did 27mpg. The 335i was a manual.
The B58 is a cracking engine. Broad spread of power and a nice soundtrack. On a steady motorway run at 70, I'm sure you'd get high 30's. Realistically, i think 28-32mpg is where they tend to settle.
That being said, I currently own an Alpina D3, and I wouldn't swap it for a 340i.
drdino said:
Mind if I jump in on the thread as well? Got a similar dilemma, I do around 10k a year so don't really need a diesel. My commute is 25+25 miles each day, with v. light to moderate (on the off day) traffic. Mix of 40/50/NSL road, currently get 37-38mpg on my 308 GTi. Would around 30-32 mpg be realistic, or would I be looking at below 30s with a 340i? Don't care about mileage on a hoon, just the "daily" bit...
I would say low 30s is easily possible in those conditions. Any run over ten miles without lots of starting and stopping, I would have expected over 30 in my 440i. I know this is a few stages away from a 340i, but for reference we ran a manunal M135i for 20k miles. We averaged 32 mpg over that time. Longer runs would see 37-40 mpg when sticking to speed limits. We live in the countryside and the road network is pretty free-flowing so we always get good MPG out of our cars.
An auto M135i is meant to be more economical, and the B58 is meant to be more economical than the N55, so i'd hope to see mid-30s on average and be hitting 40mpg on my 80 mile commute quite regularly.
An M140i or 340i is definitely on my radar
I ran a 130i manual for a couple of years and that averaged 30mpg. If driving like a nun i could squeeze 36mpg out of it but it was painful.
An auto M135i is meant to be more economical, and the B58 is meant to be more economical than the N55, so i'd hope to see mid-30s on average and be hitting 40mpg on my 80 mile commute quite regularly.
An M140i or 340i is definitely on my radar
I ran a 130i manual for a couple of years and that averaged 30mpg. If driving like a nun i could squeeze 36mpg out of it but it was painful.
richatnort said:
drdino said:
Mind if I jump in on the thread as well? Got a similar dilemma, I do around 10k a year so don't really need a diesel. My commute is 25+25 miles each day, with v. light to moderate (on the off day) traffic. Mix of 40/50/NSL road, currently get 37-38mpg on my 308 GTi. Would around 30-32 mpg be realistic, or would I be looking at below 30s with a 340i? Don't care about mileage on a hoon, just the "daily" bit...
I'd say like 26 max!For the OP, I don't do many motorway journeys but did manage this a couple of years ago travelling from Milton Keynes down to mid Hampshire (M1, M25, M3 then ~15 miles of A roads). Mostly entailed cruise controlled 70-75 on the motorway with about 10 miles of enforced 50mph and again all done in Comfort mode. Note the average speed so wasn't dawdling
Last two days, ~85 mile trip (each way) to Reading and back.
Way there was mostly DC/motorway but terrible traffic in the town centre, took me nearly 2 hours instead of the usual 1h 20m.
Way back I came off at Swindon West and drove country roads back.
There- 35.4mpg
Back- 34.8mpg
That's cruising at ~75 on the motorway and "enjoying" the minor roads as much as other traffic would permit me.
However:
It's not fun, but it can be done!
Way there was mostly DC/motorway but terrible traffic in the town centre, took me nearly 2 hours instead of the usual 1h 20m.
Way back I came off at Swindon West and drove country roads back.
There- 35.4mpg
Back- 34.8mpg
That's cruising at ~75 on the motorway and "enjoying" the minor roads as much as other traffic would permit me.
However:
It's not fun, but it can be done!
Edited by HM-2 on Thursday 23 January 19:55
2017 340i auto.
I do mostly short journeys to work, 5 miles each way, then the occasional 20-25 mile blast along a mix of country roads and A roads a few times a week.
Averaging 25mpg at the moment.
When cruising on the motorway between 70-80I get around 38ish, struggle to hit 40+ without slowing well below 70.
...And thats with the crap sounding standard exhaust! Once I get something that sounds a bit better im sure the MPG will plummet a bit more :/
I do mostly short journeys to work, 5 miles each way, then the occasional 20-25 mile blast along a mix of country roads and A roads a few times a week.
Averaging 25mpg at the moment.
When cruising on the motorway between 70-80I get around 38ish, struggle to hit 40+ without slowing well below 70.
...And thats with the crap sounding standard exhaust! Once I get something that sounds a bit better im sure the MPG will plummet a bit more :/
In the last few months, I've swapped my 435D Gran Coupe xDrive for an F31 330D Touring xDrive.
The 435D was reasonably quick obviously. Responsive on the throttle and wanted to be driven fast. Well I wanted to drive it fast. Returned me about 30mpg with a mix of urban and motorway. Maybe 35mpg on motorway from memory.
The 330D is quick enough. Doesnt feel like it wants to be driven fast, but can overtake and go when I need to. Its quick off the line when you need / want to be. And it returns me 44mpg on a motorway drive at the speeds youre talking about, with a bit of overtaking and fun on top too. To me it's the perfect all rounder.
The 35D engine just isnt much faster than the 30D in most situations. Sure it'll have an edge and sure it'll pull away over a 30D a little bit. But barely. The extra 50hp doesnt really add enough fun to justify itself in my mind.
I read loads of people saying get the 35D on here. And I get that. More power... is more power. But ultimately a 35D isnt really a properly fast car anyway. So going from 308hp down to 258hp (if my figures are right) really hasnt been all that noticable. Its still plenty quick and does the job.
I'm sure the 340I is lovely to drive and I'll be sure to get one at some point when prices come down, but for me I just cant see the point in having something that returns less than 40mpg on long motorway runs. It's a motorway. It isnt a fun road.
The 435D was reasonably quick obviously. Responsive on the throttle and wanted to be driven fast. Well I wanted to drive it fast. Returned me about 30mpg with a mix of urban and motorway. Maybe 35mpg on motorway from memory.
The 330D is quick enough. Doesnt feel like it wants to be driven fast, but can overtake and go when I need to. Its quick off the line when you need / want to be. And it returns me 44mpg on a motorway drive at the speeds youre talking about, with a bit of overtaking and fun on top too. To me it's the perfect all rounder.
The 35D engine just isnt much faster than the 30D in most situations. Sure it'll have an edge and sure it'll pull away over a 30D a little bit. But barely. The extra 50hp doesnt really add enough fun to justify itself in my mind.
I read loads of people saying get the 35D on here. And I get that. More power... is more power. But ultimately a 35D isnt really a properly fast car anyway. So going from 308hp down to 258hp (if my figures are right) really hasnt been all that noticable. Its still plenty quick and does the job.
I'm sure the 340I is lovely to drive and I'll be sure to get one at some point when prices come down, but for me I just cant see the point in having something that returns less than 40mpg on long motorway runs. It's a motorway. It isnt a fun road.
Edited by Alextodrive on Thursday 6th February 00:14
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