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bjs2013uk

1.0 Ecoboost 123Ps Or 100Ps

14 posts in this topic

Hi,

I am looking at purchasing a brand new Ford Fiesta Titanium in the next couple of weeks but I am really unsure on what engine size to go for - 123PS or 99PS. I do a lot of driving about town and not a lot of motorway driving at the moment, however this could change in the near future.

Please could someone explain the suitability of both engines, i.e. what are the benefits, drawbacks and what type of drivers are they best suited to?

Also are there two variants of the ecobost engine, in terms of turbo charged and non-turbo charged, I am slightly confused!?

Thanks very much in advance!

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As far as im aware they are identical turbo 3-cyinder engines but with different maps

I have heard reports that the 125PS is "peaky" and needs to be revved to get the best from it, and cannot be driven in a high gear round town etc, and that the 100ps version is "torquier" and better at lower revs, even on the dual carridgway in a high gear etc

Of course, when "redlining" it through every gear the 125PS would be quicker, but for normal, road use, you may be better off with thev 100PS, but this is open to debate

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There is also the 80PS (non turbo) version of the engine - because of this it is not called an "Ecoboost"

Jim

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Go to a dealer explain the situation and go for a test drive.

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I did test drive both, the sales assisstant who came along on the test drive was emphasising the use of higher revs on the 125 but he stated that he could personally not tell the difference between the 100PS and 125PS. I couldn't really tell the difference either but this may have been due to the short test drive that I went on. I did find both suitably quick at pulling away and accelerating. However I am planning on keeping the car long term, so I don't know whether to go for the 125.

Anyone else with any views on the two different engines to help me decide?

Thanks

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Personally I think a low capacity engine turbo'ed to death to get economy is a false economy. Yes they will get massive mpg if you drive like miss daisy. But if you drive them even slightly quick the fuel economy drops through the floor. And if youve a pancheant for speed youll be lucky to get 20mpg!!

For my money id go higher capacity, as it will be easier to drive than a 1 litre and ultimately provide better economy when driven normally.

But of the two id get the 125 as if you get the 99 youll only wish you had the 125!

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Well sometimes less is more and though the 125PS has more "on paper" power the extra bit of flexibility of the 100PS means its a bit more tractable and for example requires less downshifts for climing hills etc

Ive found the Bluefin power/ torque graph for the 125PS (they did not have one for the 100PS to make a direct comparison) and if you look at the stock turque curve it makes about a healthy 175Nm (133ft-lbs) at 2k, but under 2k the torque "drops off the cliff" or "dissapears" (almost a vertical drop) which means for any practical purposes, the revs must be kept above about 2k for the car to accelerate at all, and 2-1/2 - 3 for it to "shift" - i dont know the exact speeds, but around town i would be surprised if you could use more than 3rd, and climbing hills will almost always require downshifts

So because the 100PS is a bit more flexible than the 125, in some situations and for some drivers it is better than the 125PS

Bluefin power/ torque showing how the ecoboost 125PS is "gutless" below 2k -

http://www.mybluefin.co.uk/curves/10%20EcoBoost%20125PS.pdf

This is not a criticism of the engine - these are amazing little engines lightweight, compact, advanced, efficient- expect to use the gearbox though

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Hi, I suggest that you compare the power/torque with the engine it is replacing. Then you will find it is perfectly drivable below 2k.

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Personally I think a low capacity engine turbo'ed to death to get economy is a false economy. Yes they will get massive mpg if you drive like miss daisy. But if you drive them even slightly quick the fuel economy drops through the floor. And if you've a pancheant for speed you'll be lucky to get 20mpg!!

For my money id go higher capacity, as it will be easier to drive than a 1 litre and ultimately provide better economy when driven normally.

But of the two id get the 125 as if you get the 99 you'll only wish you had the 125!

I'm getting 40 to the gallon and drive it like my old focus ST. Its amazing how good the fuel consumption is for a turbo'd petrol engine.

To the OP if you love driving then you'll get bored of the 100hp and want something with more power so get the 125hp version ;)

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@FOCA If I remember correct the 100 has a max of 170nm. The dyno show that the 125ps has170nm at about 1700revs.

I own a 125ps and it can acc from much lower revs.

Until we see a dyno of a 100ps nobody can tell where the difference is.

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Thanks to everyone that has replied so far!

I am still a little torn between the two! However I have found the following website that compares the two engines:

http://www.carwow.co.uk/blog/Ford-Fiesta-EcoBoost-100PS-Review-361

(Sorry if I'm not allowed to post external links)

Sort of makes me think the extra premium for the 125bhp isn't really worth it in my instance.

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I vote a blind test drive. As in, you don't know which ones which, not driving while blindfolded! :p.

I did the same when I bought a new bass amp. I was too focused on "ooh, that ones more powerful!" Then I was blindfolded, plugged into several amps, and actually picked the one with the nicest tone.

Its all well and good the 100 being better on paper, but if you don't know which ones which, you won't be biased. If the 100 is the better car, you'll realise then.

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Great Suggestion Minnis, I have the 125ps and it's rapid when booted but is happy to pootle in 4th just over 30 mph, its got plenty of get up and go sat in third at 30 when you put your foot down it accelerates quickly to 60+

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Hi, the majority of tests I have read on the 100ps state that it is quicker than the figures suggest. Car Magazine write, "a healthy spread of power and torque (125lb ft from 1400-4000rpm) and pulls more strongly from low revs than its rivals". What Car say "the 99bhp Ecoboost petrol is the pick of the range. It pulls strongly from
low revs and revs smoothly and eagerly. In fact, it’s so strong that there’s little point in upgrading to the 123bhp Ecoboost." These new engines are based upon diesel technology thus they have 'diesel like' qualities in the way they drive. I know my own car isn't the same but it'll pull from 30mph in 5th easily and very smoothly and shows what the ecoboost can do...

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