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Discussion Starter · #1 ·
Warning: Rant!

I'm getting bored of reading stupid comments on facebook and forums regarding the power output of the 1.0T compared to the 1.4T, with many people choosing the 1.0T because it 'has more power'. It seems the majority of these people don't seem to read or understand even basic things. :cry:

The 100 and 115 PS figures shown against the two engines are actually recorded at completely DIFFERENT rpm's so they can not be directly compared.

The 1.4T makes 25% more torque at 1800rpm which makes it the more powerful and desirable unit for most daily driving, especially for hills or carrying passengers.

The 1.4T makes its peak 100PS at only 3500rpm making it very diesel like in having the bulk of the power in a narrow band which happens to be the band that you use for 99% of your driving or should be if you want good mpg and long engine life. At 3500rpm the 1.4T is making more power than the 1.0T too.

The 1.0T makes only 115PS at a sky high 5000rpm. If the 1.4T was running a comparable map to deliver its power at higher rpm it would be producing 150PS at 5000rpm. If you like revving the b*ll*cks out of your engine then 30mins at a specialist will have a 1.4T delivering that 150PS quite easily. However continually having to rev high to get that power will significantly reduce engine life compared with an engine that delivers its power/torque at lower rpm.

So any way you look at it the 1.4T is the more powerful engine than the 1.0T when comparing apples with apples.

Of course the 1.0T is more refined and may suit people who do short journeys where it will warm up faster and potentially give better mpg on short runs. Indeed the engine does well in the current EU emission test as that is biased to small engines. So I can quite accept somebody choosing the 1.0T because of refinement or short journey mpg, lower VED band etc, what is annoying is those choosing it based entirely on 100PS versus 115PS without understanding how the figures were derived or their impact on drivability and economy and then making daft comments about their 'more powerful' engine.

Rant over :)

Apologies. Just had to get it off my chest as I've seen a dozen stupid comments in the last week alone.
 

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Discussion Starter · #6 ·
gkmorris said:
:D well done mud4fun
Thanks :)

Of course there are other benefits of the larger engine. For one, it produces more waste heat which means that in a cold, damp and sun-less country like the UK you won't need to be driving around with the heated screen, seats and wheel turned on or having the heater on full blast all the time which kills mpg. While the smaller engine warms up faster, the larger engine keeps the occupants warmer :)
 

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Thanks Mud4fun for this info. I had said from the start that I wanted the 1.0t purely because it had a higher ps than my current car. I had felt that the 1.4t wouldn't feel as fast. I was proved wrong last week when I test drove both 1.4 versions (turbo and non-turbo). The turbo one was amazing and has actually made me think that I wouldn't really need to spend the extra money on the 1.0t.

While we are on the topic of engines, could you tell me the difference between the 1.4 engines please? The one I drove was the SRi vxline which had the 1.4t 110ps s/s engine. In the brochure, there are two versions of the 1.4t - one is s/s ecoFlex and the other just s/s. The first emits 120g/km CO2 (16" wheels) and the latter emits 123 g/km (17" wheels). Is it purely the wheel size that makes the CO2 emissions higher? Maybe it's just that my old female brain can't work it out! :lol:
 

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Discussion Starter · #8 ·
Hi Leachie, don't worry it wasn't you I was referring to. :) Just had a few people coming out with things like the 1.4T is cr*p because it has less power....

At the end of the day they are both good engines but suit different people with different needs. One may perform better in one scenario such as short local journeys where the other performs better in another scenario such as motorway cruising.

I'm not aware of two different 1.4T engines in the Corsa E. There is a 1.4 normally aspirated and the turbo. The slight differences in Emissions between trims is probably down to the sport suspension models having wider tyres which increase rolling resistance and reduce mpg. Won't make much difference in the real world but in the lab tests it is probably enough to add a few g/km. I don't mind, I ordered my 1.4T LE knowing it would cost £130 a year VED, still half what I'm paying for my current vehicle. :)
 
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You know your stuff mud4fun lol, basically there are 2 1.4 engines, a 1398cc non turbo and a 1364cc turbo, yes the models with 17" wheels have a slightly higher emissions due to as you said the increased rolling resistance due to the wider tyres and increased rolling radius of the larger tyres (for each complete revolution of the wheels the car will move slightly further therefore requiring more energy to move it that distance, if I remember my technical diploma correctly lol )
 

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Discussion Starter · #10 ·
LeachIE, forgot to add that you definitely need to try the 1.0T before buying. I test drove one and it was very good just not suitable for my long commute. It may well suit you more especially as you'll be doing lots of short journeys on the IOW. Most of my journeys are between 30 and 260 miles so larger engine slower warm up time is simply not an issue and most of time I'm cruising in top gear at low rpm. I suspect you may be doing the opposite with very short journeys, lots of gear changes etc.
 

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Discussion Starter · #11 ·
gkmorris said:
You know your stuff
Thank you. To be honest I know very little about Corsa specifically however I've been rebuilding and restoring vehicles for the last 30 years. Having stripped, rebuilt and tuned numerous engines over the years I have a good working knowledge of engine design, operation and tuning, mostly diesels but have built several V8's and rebuilt a couple of Vauxhall Nova engines too :)

If you take a peek here and scroll down a bit you'll see the work I've been doing to my wife's 2.25 diesel which I've virtually rebuilt with new parts over the last few years.

http://mud4fun.com/category/annie-refurbishment/engine-2-25d/

And here is my Land Rover 2.5TDi rebuild progress:

http://mud4fun.com/category/ciggy-rebuild/engine-200tdi/

I'm also about to start a rebuild on a 2.25 petrol and get that tuned for max power :)
 

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Discussion Starter · #12 ·
BTW I'm not for a minute suggesting I'm an expert on engines, just that I know enough to question the manufacturer stated figures and to try and understand the conditions in which they were derived.
 
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I hate to be the bearer of bad news mud4fun but saw a limelight green LE on a transporter today, only trouble is it was Northbound on the A12 just north of Chelmsford so I doubt it would be going to your neck of the woods, looked nice though, certainly stood out as it was on the top deck at the front.
 
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