I worked it out the only way I know. The 3008 done 90 miles for £20 of petrol and that was at £1.10 to £1.20 price per-litre then.
My tariff started at 0.12p a kw and is now 0.18p a kw
The 3008 over 34390 miles would have cost around £7640 at the prices then, bearing in mind the has shot up it should be more at the last few years prices.
The Kona which I believe has give me bad MPKW works out at an average of 0.13p a KW and has cost me £2952.
That’s a saving over 2 & 1/2 years of £4688 I think lol. From the brain injury numbers really confuse me now.
Ps the Peugeot 3008 1.6 GT line had terrible MPG and the kona has terrible MPKW