The difference between the Mk3 & Mk4 Yarises...

[CPN]

Here is all you need to know about the consumption difference between the two Mks...

Note that both cars were driven in exactly the same way by the same driver only (me) with the same settings where appropriate. I have never driven either car "as a hybrid". Rather, I have driven them both normally for me and if anything ( @Cyker ), the Mk4 has been driven in a more "spirited" manner because it seems to "like it" that way lol!

Admittedly"Knightrider's" figures are based on twice the amount of fill-ups and almost 3 times the mileage but also note that each measurement was carried out in exactly the same way, neck to neck (and I do mean to the edge of the filler without spillage and after air expelled) so I think it is a meaningful comparison. Lastly, I really struggled to get Knightrider's best of 56.1 on a long run back from my mum's once. The telling thing is that in the case of Red Baron, that best of 64.3 was the tank I have just filled today and it happened with no special effort at all and we are entering the cooler part of the year to boot! In fact, I have had a few 60+s in the last couple of months and that's very telling also.

Lastly, I always felt that the Mk3 was slightly underpowered and I was always very conscious of it being a hybrid. In the case of the Mk4 (which I love), it feels so much more like a "normal" car and I have lost that feeling of "this is just a hybrid so I should take that into account when I am driving it" completely. Coming from someone who has driven quite a bit of high powered machinery in my time, that says a lot for the Mk4.

[flash22]

I get high 50's out of my mk3 during the winter, mid to high 60's in the summer

managed to break the 80's a few times this year

 

its easy to get a Mk 4 in to 70-80 range

[Derek.w]

How often are you resett it I only reset mine once a Year unless I disconnect the Battery for other work.

[CPN]

7 minutes ago, Derek.w said:

How often are you resett it I only reset mine once a Year unless I disconnect the battery for other work.

I never go by the dashboard gauge as it is way too optimistic! I have mine set so that it auto resets on every fill-up. The dashboard gauge showed 69.6mpg on this last fill-up when the reality calculated was 64.3mpg so I just ignore the dashboard gauge. It gives me a rough indication plus about 10% so I suppose I can use it as a general guide but that's all...

[CPN]

16 minutes ago, flash22 said:

I get high 50's out of my mk3 during the winter, mid to high 60's in the summer

managed to break the 80's a few times this year

I'm not surprised at such a low average speed!

16 minutes ago, flash22 said:

its easy to get a Mk 4 in to 70-80 range

If you drive like a snail, yes it is.

[flash22]

90% of my driving is urban or extra urban, I have calculated mine by brim to brim fills, and it's within 2-5%

[Cyker]

4 hours ago, CPN said:

Here is all you need to know about the consumption difference between the two Mks...

Note that both cars were driven in exactly the same way by the same driver only (me) with the same settings where appropriate. I have never driven either car "as a hybrid". Rather, I have driven them both normally for me and if anything ( @Cyker ), the Mk4 has been driven in a more "spirited" manner because it seems to "like it" that way lol!

Admittedly"Knightrider's" figures are based on twice the amount of fill-ups and almost 3 times the mileage but also note that each measurement was carried out in exactly the same way, neck to neck (and I do mean to the edge of the filler without spillage and after air expelled) so I think it is a meaningful comparison. Lastly, I really struggled to get Knightrider's best of 56.1 on a long run back from my mum's once. The telling thing is that in the case of Red Baron, that best of 64.3 was the tank I have just filled today and it happened with no special effort at all and we are entering the cooler part of the year to boot! In fact, I have had a few 60+s in the last couple of months and that's very telling also.

Lastly, I always felt that the Mk3 was slightly underpowered and I was always very conscious of it being a hybrid. In the case of the Mk4 (which I love), it feels so much more like a "normal" car and I have lost that feeling of "this is just a hybrid so I should take that into account when I am driving it" completely. Coming from someone who has driven quite a bit of high powered machinery in my time, that says a lot for the Mk4.

I think it really does like it too!!   

It is what I consider a genuinely economical car, as you don't have to drive it economically to get decent mpg.

My old D4D was the same - Even when I was hooning it it was very very difficult to get it lower than mid 50's mpg; With this that point is even higher, I'd say mid 60's maybe, but even when I've gone for a hoon in mine it recovers back to mid-high 70's very quickly! It's magic I tell you!  

The Mk2 made me work for the mpg; If I drove it 'naturally'  the mpg would absolutely crater, and it felt really gutless coming from the D4D so it was no fun to drive on top of it all! The engine was buttery-smooth compared to the D4D and Mk4 tho'  

The Mk4 also feels like it has a lot of power on tap.  I think I said in another thread it has a slight Jekyll and Hyde-ness to it...

 

4 hours ago, CPN said:

I'm not surprised at such a low average speed!

its easy to get a Mk 4 in to 70-80 range

If you drive like a snail, yes it is.

I don't drive like a snail and I'm getting that  

Although to be fair my 'exuberant' driving is mixed with crawling through London traffic so you may have a point there...

Also I'm not sure how much the 15" rims are helping, as smaller/lighter rims can give a disproportionately large advantage in stop-start traffic. (Which is mostly what I'm in during the day  )

That said, just driving like a snail doesn't seem to give it great mpg either, it seems to be the mix. I think it's like my D4D - I started driving that harder and found the mpg not only didn't go down, but actually went up a bit, and I theorized it was because the engine got hot faster, so the extra fuel used from (slightly) more aggressive driving was offset by the efficiency jump from not having a stone-cold engine for half the commute!

I find if I can keep the Mk4 at 3-4 blocks of heat, it gets noticeably better performance and mpg than when it's at 1-2. (Although it starts to get trickier as it gets colder!)

The figures I normally report are car-indicated tank averages - My last 5 were

77.4, 80.0, 76.3, 76.7 and 76.9  but the calculated figures were

73.7, 78.2, 71.6, 76.1 and 71.45 so there is definitely some offset, but the error isn't consistent (Probably in large part because the pump cut-off isn't consistent!)

I don't think I've had an indicated tank average drop below 70mpg since I've had it, but my calculated averages were very much in the mid-60s last winter.

 

[TonyHSD]

Well, mk4 is a step forward and has the next gen hybrid drive train, new chassis too, new Battery, completely different car from mk3 Yaris so mpg difference to be expected. This is one reason I did not change my car for another hybrid from the same generation just made more recently, but gen 4 or gen 5 hybrid perhaps will be a welcome change. Can’t wait to see what the next Prius will bring to the hybrid world. 👌

[Mojo1010]

Good for those who have/had or the MK3 hybrid or looking at the MK3/4 to see the comparison from someone who owned both. The MK3 is absolutely fine for urban, extra urban and some occasional medium and the very odd long distance trip. 

Where it's lacking is if you do regular medium and some long journeys especially on the narrower tyres of 175-185mm. Lacks grip, power and it's noisy when flooring the gas joining the motorway or coming off a roundabout and need to speed up to speed limit quickly.

With technological and other improvements, glad the MK4 has fixed all these things. It will cost 140 on road fund, though it would be made up by being more fuel efficient. Totally looking forward to getting it next summer!