MPG for those interested

[Jazzik]

But for noise and how quickly it can make rubber become smoke it for sure loses with the types of car 150234 would go for.
Maybe a TROLLeybus would be something for 150234... https://www.tbus.org.uk/home.htm

[jamjar]

First refuelling 465 miles, 30.65 litres so 69.3 mpg (car claimed 73 mpg).

Second refuelling 515 miles, 32.90 litres so 71.2 mpg (car claimed 75.1 mpg).

The "fibometer" appears to be about 5% optimistic - nothing new there!

Just checked on my Honda+App, one 24 mile journey showing 79.9 mpg (Kendal in Cumbria to Morecambe). Any idea on the accuracy of this figure on this app?

[sportse]

Seems pretty accurate- on long motorway trips I’m getting maybe 55mpg but as soon as the speed drops the mpg goes up.

I did a trip on the M25/M4 in rush hour, 25 miles at maybe an average 50mph & got 70mpg.

Coming back later with no traffic and a steady 70mph average the mpg was normal around 55mpg.

Trips off the motorway at up to 60mph and getting around 60mpg.

So for me, very roughly long distance average speed gives:

70mph - 50+mpg

60mph - 60mpg

50mph - 70mpg

[John Ratsey]

Just checked on my Honda+App, one 24 mile journey showing 79.9 mpg (Kendal in Cumbria to Morecambe). Any idea on the accuracy of this figure on this app?

The My Honda+ app shows exactly the same mpg numbers as the Trip Computer function on the big screen. I assume that these numbers have the same optimistic bias as the miles per refill otherwise the overall numbers wouldn't add up. I'm currently on 4.77% optimism bias.

The claimed 79.9 mpg Kendal to Morecambe is plausible as I've found that the hybrid system is very sensitive to any height difference between start and end points. Kendal is about 200ft above sea level and any downhill journey increases the proportion of the time when the car can be running on battery. Was it a dry day? I've found that wet roads cause a surprising reduction in the mpg.

[Derkie54]

First refuelling 465 miles, 30.65 litres so 69.3 mpg (car claimed 73 mpg).

Second refuelling 515 miles, 32.90 litres so 71.2 mpg (car claimed 75.1 mpg).

The "fibometer" appears to be about 5% optimistic - nothing new there!

Just checked on my Honda+App, one 24 mile journey showing 79.9 mpg (Kendal in Cumbria to Morecambe). Any idea on the accuracy of this figure on this app?

On my first trip on fairly clear and level B roads I also got a reading of 79.9 mpg.

[jamjar]

Just checked on my Honda+App, one 24 mile journey showing 79.9 mpg (Kendal in Cumbria to Morecambe). Any idea on the accuracy of this figure on this app?

The My Honda+ app shows exactly the same mpg numbers as the Trip Computer function on the big screen. I assume that these numbers have the same optimistic bias as the miles per refill otherwise the overall numbers wouldn't add up. I'm currently on 4.77% optimism bias.

The claimed 79.9 mpg Kendal to Morecambe is plausible as I've found that the hybrid system is very sensitive to any height difference between start and end points. Kendal is about 200ft above sea level and any downhill journey increases the proportion of the time when the car can be running on battery. Was it a dry day? I've found that wet roads cause a surprising reduction in the mpg.

Yes it was a dry day, I did notice EV mode was on on some points driving at 67 mph as well. The downhill drive as you mention is more likely to give a better mpg.

[Neil Ives]

Hybrid economy 

[jamjar]

  Now that is economy!

[Neil Ives]

A longer journey, mostly on motorway:

[150234]

But for noise and how quickly it can make rubber become smoke it for sure loses with the types of car 150234 would go for.
Maybe a TROLLeybus would be something for 150234... https://www.tbus.org.uk/home.htm

I mean, I would expect the Jaguar XF 3.0 V6 280hp and 600nm of torque to beat a Golf, and definitely a Jazz.

Did I mention RWD for them mini roundabouts.

[sportse]

I mean, I would expect the Jaguar XF 3.0 V6 280hp and 600nm of torque to beat a Golf, and definitely a Jazz.

Did I mention RWD for them mini roundabouts.

Assuming a perfect Jaguar launch every stop (left foot braking to build up the revs and turbo, and a bit of wheel spin,which will wear the transmission/etc), it’s actually only 0.8 seconds faster to 37mph than a crosstar:

Duel: Honda Jazz IV Crosstar e:HEV vs Jaguar XF 3.0 D S

Whereas all the Jazz driver has to do is calmly press the accelerator to launch. The Jaguar driver has to dial up the revs and find traction every time perfectly to get that launch performance. Just pressing the accelerator with no revs build up first in many diesels adds 1 second to the 0-60mph time.

With lots of mini roundabouts, the Jazz driver actually has a real chance of winning against a 280hp diesel XF!

In a drag race to 30mph, from idle, the 110hp Jazz should beat the 280hp XF. It has over 500kg less weight, and 250Nm available from zero revs.

You even get a nice noise with fake gear shifts in the Mk4 under full acceleration:

(For all points - Professional Driver/Closed Course obviously)

[150234]

I mean, I would expect the Jaguar XF 3.0 V6 280hp and 600nm of torque to beat a Golf, and definitely a Jazz.

Did I mention RWD for them mini roundabouts.

Assuming a perfect Jaguar launch every stop (left foot braking to build up the revs and turbo, and a bit of wheel spin,which will wear the transmission/etc), it’s actually only 0.8 seconds faster to 37mph than a crosstar:

Duel: Honda Jazz IV Crosstar e:HEV vs Jaguar XF 3.0 D S

Whereas all the Jazz driver has to do is calmly press the accelerator to launch. The Jaguar driver has to dial up the revs and find traction every time perfectly to get that launch performance. Just pressing the accelerator with no revs build up first in many diesels adds 1 second to the 0-60mph time.

With lots of mini roundabouts, the Jazz driver actually has a real chance of winning against a 280hp diesel XF!

In a drag race to 30mph, from idle, the 110hp Jazz should beat the 280hp XF. It has over 500kg less weight, and 250Nm available from zero revs.

You even get a nice noise with fake gear shifts in the Mk4 under full acceleration

But will the rear end slide out in the mk4? I think not.

5.9 seconds to 60mph will thoroughly slap the mk4 about the place, any day of the week. As for 0-37mph, I don't remember seeing that test on Top Gear. Who races from idle? Like who?

How exactly would a Jazz beat an XF around mini roundabouts? I just have to boot the throttle and around she goes, I'm going back where I came from in less than a second.

As for torque, well 600nm at 2000rpm will be lovely.

The mk4 just doesn't compare, in anyway.

[Jazzik]

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[Kremmen]

I've completed 2 of my regular weekly journeys along the M4 and fast A roads and my average mpg is just under 70mpg. I can't see that getting any higher.

Probably lower when the M4 returns to 70mph

[sportse]

75+mpg the other day just driving normally on 40/50/60mph roads.

Even on fairly short trips I’m getting 50+. My Toyota hybrid was over 10mpg less on the same roads.