When on cruise control on motorways it spends a surprising (to me) amount of time running on the batteries - unless you're going >82mph. It'll also switch the engine off as soon as you come off the accelerator when not using cruise. It's quite normal on long motorway journeys for the car to to say that between 20 and 35% of the journey has been 'emissions free', i.e. engine off. My mother has a 1.4TFSI Sportback (manual) at gets 50 ish on long journeys, and is averaging low 40s overall. So ours is using half the petrol..and a chunk of electricity.
I haven't worked it our recently, but on a cost basis taking into account petrol and electricity costs, and working back to equivalent litres of petrol (if that makes sense?) it works out at mid 70s to the gallon I think
Last edited by: PeterS on Mon 10 Apr 17 at 22:42
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