AndyRC

We have signed the order for a 2.0L C-HR today which should hopefully be with us in around 2 weeks. As it will get used for business and pleasure , up to 20,000 miles per year, we will be keeping accurate records of mpg so will be able to report in due course.

https://www.pistonheads.com/news/ph-japanesecars/goodwood-debut-for-2022-toyota-gr-86/44337 At last, those lucky enough to be going will get to see the GR86 up close 😎

Glad that you got to the bottom of the significant difference , will be interesting to hear what the difference is over several refills and different driving conditions.

I’ve only tried the 2.0l version and have found the performance to be more than adequate and overall feeling very relaxed and unstressed.

One can only assume the mover to larger wheels is a marketing/aesthetics thing. I’ve never driven a car that rode better on a larger wheel than a smaller one. This all seams bizarre if larger diameter wheels increase fuel consumption and emissions when manufacturers are trying to reduce their overall fleet average emissions 🤷‍♂️

Charles. I can’t explain that anomaly and 33% is a long way out. I’ve found most onboard computers are usually around 4/5% optimistic. Do you keep records and do a comparison check on every refill? I’ve been running my son’s old Fiesta EcoBoost for a few months and on very similar types of journeys I’ve seen variations between 2% to 6% and that’s without any Hybrid technology to confuse things, on average it’s around 3% optimistic. Maybe monitoring over a longer period will highlight if yours is always 33% out. Our C-HR will get used for business so expecting to be doing 15k to 20k a year

You will see different readings between the onboard and calculated depending on the type of journey completed for that tank of fuel. I always kept a detailed record of milage and fuel used for car expenses at work as we we paid a flat rate per mile. If I bettered the rate I was in profit, didn’t hit it I was losing out. My experience was that once you had sufficient data to smooth out anomalies , say 10 full tank refills, the difference between the onboard and calculated readings settled down to a pretty consistent % difference. I never managed to get a better calculated mpg than the mpg th

Agree that the only accurate way is to calculate based on “brim to brim” refills. I always do this with cars I own and compare with the car computer. These have always been optimistic, worst being a Vauxhall Astra at 14% optimistic and the most accurate being on a Golf R 2% optimistic.

Took a 2.0L C-HR Design out for a decent test drive of nearly 60 miles , mix of M Way , A/B roads and some town driving , drove at the relevant speed limit and the onboard computer was reading 60.7 mpg, even if the computer is 5% optimistic that’s still an impressive 57.7 mpg. The 2.0l engine never felt underpowered and overall very impressed with the car👍

https://www.toyota.co.uk/# At least the GR 86 is now listed as Coming Soon on the U.K. website 👍

We got both an Prius+ 2017 standard HSD/Hybrid and an Prius PHV Plug In 2018 and, we have driven our Prius+ for 2,5 years and in all seasons and when I´ve checked fuel consumption at pump, using "Fuelio" app it says our Prius+ has consumed average 5.03 L /100 km ( about 56.16 mpg I think) Qite nice I think. Our Prius PHV Plug In 2018 consumes even less and we have been able to drive 73% on pure EV. There is moore to read abot that car here - Thoughts after two months with our Prius 2018 PHV - Prius Club - Toyota Owners Club - Toyota Forum

There must be a logical answer to this question but at the moment I can’t see it, or understand why on a like for like basis , eg total weight , width, rolling diameter, ET, contact patch etc why a 17 inch set up gives better mpg than a 18/19:set up 🤔

I can understand how a larger tyre wall will deflect more but can’t see the connection to mpg🤔

What I can’t understand is why there is so little interest in the GR 86 in the U.K. on here or any of the GT 86 forums 🤔 It’s a great looking car and the 2.4 engine appears to address the torque dip of the 2.0 🤷‍♂️

As a cyclist I get that the reduction in total wheel mass , a lighter wheels&tyre is a LOT easier to accelerate and maintain a constant speed compared to a heavier set up. What I don’t get is why a 17 inch wheel tyre combo of equivalent weight and diameter would be worse than a 19 inch combo 🤔