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1.4 TSi ACT economy

Discussion in 'Leon Mk3 (2012-2020)' started by Mr Pig, Jan 18, 2020.

  1. mdaw1985

    mdaw1985 Active Member

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    I think im averaging 47 mpg after 6k miles but I don't have a choice of modes. I do a mix of driving on mainly a and b roads plus dual carriageways on trips that I do. Also it gets used by my wife for town stuff as well. I often drive 15 miles plus on trips I tend to make and often I get 50+ mpg on those runs. Other times when on the dual carriageways I'm only getting 45 mpg. As was stated previously lifting and coasting can make a huge difference. The other week I got 60 mpg on a 30 mile run and 58 on the way back. Admittedly I wasn't pushing it that day.
     
  2. OJ9693

    OJ9693 Mk3 Leon FR 150

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    I have a 2015 150 FR and i drive mainly A roads with about 3 miles of town driving (29 miles total) and i get between 42-44mpg.

    That's in sport mode and not driving erratically but maybe overtaking a few cars, I rarely go over 80mph.. I mean 70.

    I think if i tried i could get it higher but i'm not really fussed about it.
     
  3. hilly81

    hilly81 Active Member

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  4. Mr Pig

    Mr Pig Active Member

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    Cold air is denser so wind resistance is higher. Also, I know that they use a different formulation for diesel fuel in the winter, it works better at lower temperatures but you get less mpg out of it. It may be the same for petrol but I don't know.
     
  5. Jazzjames

    Jazzjames Active Member

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    In the Winter the car takes longer to get to operating temperature and is less efficient until it gets to that temp. Many short journeys obviously make this more pronounced when calculating a long term average/tank average.

    The fuel economy you are quoted is really not what you’re actually going to get on the road. The test that was carried out until recently was the NEDC. This has been improved to the WLTP test, which is closer to reality. Useful for comparing different cars, at least.
     
    #45 Jazzjames, Jan 21, 2020
    Last edited: Jan 21, 2020
    Mr Pig likes this.
  6. Glosphil

    Glosphil Active Member

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    In May 2019 I bought a July 2018 Leon 1.4TSi DSG FR with 12500 miles on the clock. I have since covered just over 7000 miles & averaged 45.2mpg (calculated).
    A 8 mile return journey into town (6 mile 40 limit & 2 mile 30 limit) starting with a cold engine will see 42-44 mpg. At 70 on motorway just about 52 mpg.
    An A-road 35 mile hilly journey in 50/60 limits with some spirited overtaking will result in 37-39mpg.
    My previous Skoda Octavia vRS CR (diesel) 170 DSG averaged 43.2 (calculate) over 50k miles, so I am satisfied with the Leon's mpg.
     
  7. silles

    silles Active Member

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    20170813_220608.jpg
    My best effort was 64.1 mpg with 1.4 ACT. Bored to death never ever matched it. lol
     
  8. Sword

    Sword Active Member

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    Wow!

    Did you fall asleep at any point during this trip? Lol
     
    silles likes this.
  9. martin j.

    martin j. Active Member

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    32 mile round trip today (from cold) 1.5 miles each end in town (so 6 in total) 70 ish dual carriageway in between, 46 Odd mpg average, me happy.
     
  10. Casterina

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    How much did you pay for your FR? As I'm looking at getting a 17/18 plate manual 1.4 150bhp FR from SEAT approved cars.
     
  11. Glosphil

    Glosphil Active Member

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    It was 9 months ago. £14,750 with a full fuel tank from a main dealer and they gave £500 more then any other dealer offered for my part-exchanged 2012 Octavia vRS . Also my FR has DSG.
     
  12. Mr Pig

    Mr Pig Active Member

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    So, while we're on the subject of 1.4 performance...

    My car is 150 bhp, approximately, allegedly. Doesn't feel like it. Does't feel slow but also doesn't feel like a 150 bhp car.

    Looking at a power curve I found for the engine, it looks like power rises with revs and you only get peak power, the 150 bhp, between 5'000 and 6'000 revs. Which if correct is a bit mental. Can anyone confirm if this is right? It doesn't feel like it on my car. My car tails off by about 5k and there isn't anywhere in the rev range you would say it feels noticeably more powerful.
     
  13. Jazzjames

    Jazzjames Active Member

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    If not from 5-6k where would you expect peak power to be in the rev range?
     
  14. Mr Pig

    Mr Pig Active Member

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    Wherever they choose to put it. Depends on the engine. What I'm asking is where other people feel the power is? Is my car down on power? Dealer say it isn't and certainly the 2019 1.5 FR I drove felt much the same.
     
  15. Jazzjames

    Jazzjames Active Member

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    “Wherever they choose to put it” isn’t really how physics work, unfortunately. All internal combustion engines develop maximum power near or at the op of their rev range. The more frequently you can burn fuel, the more power you’re going to produce, right?

    While the 1.4 tsi has 250 nm of torque, the torque band is quite narrow and there is a bit of a flat spot between where maximum torque tails off and maximum power kicks in. It’s normal for that engine, and most other small capacity turbo engines comfort/economy orientated engines, I would imagine.
     
  16. BigJase88

    BigJase88 Jase

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    There is little torque and little bhp on the 1.4 and 1.5 turbo petrols, small engine = small power. Enough to do the weekly shop but thats about it
     
  17. Wilkesy

    Wilkesy Active Member

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    been considering getting race chip or TDI tuning for my 1.4 ecotsi FR but only 30 bhp gain, torque increase looks fantastic but still in two minds. Got a lot to do to the car already, I want alloys, new tyers(both at the same time if I need bigger rims), Remap/tune chip and just other bits. Also when I bought the car I managed to get a bit of money knocked off because of scratch so need that covering up too which is about £200.

    P.S. I'll get MPG on tomorrow after I get my sat nav update sorted. I was on 54mpg before the kids were back at the school, but after christmas the traffic has been terrible so im guessing its dropped loads.
     
  18. Mr Pig

    Mr Pig Active Member

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    Yes, but if you turbo the engine there will be an area where it works most efficiently. Even without a turbo power will usually tail off beyond a certain point. I don't know exactly why but that's been my experience.
     
  19. BigJase88

    BigJase88 Jase

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    Turbo engines they usually tail off higher up the rev range , the turbo has a band where it is working best.

    Most n/a engines pull right to the redline.
     
  20. Mr Pig

    Mr Pig Active Member

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    But this isn't a naturally aspirated engine. It's a turbo.

    And the naturally aspirated engines I've driven tail off. Usually, they are no longer producing peak power by the time you get to the red line. The torque is gone and it's just noise.
     

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