The replacement for petrol/diesel cars will not be on general sale while the big firms build millions of petrol/diesel engines in mega-buck engine building plants
Honda plant

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The BMW Group’s largest engine plant is in the Upper Austrian town of Steyr, responsible for the production of four- and six-cylinder diesel and gasoline engines. Steyr is also acknowledged as the competence center for the development and production of diesel engines. Supplying BMW’s car production and engine plants with its products and processing other engine components from sister plants in Landshut, Munich or Berlin, Steyr plays an active part within the BMW production network.
Hams Hall Plant
The Hams Hall Plant near Birmingham builds gasoline engines between 1.6 and 2.0 liters. The Group’s new plant in Great Britain is the competence center within the network for the production of an all-new generation of four-cylinder gasoline engines featuring VALVETRONIC technology.
They are all building newer greener engines but how many full sized 4/5 door family petrol cars can hit 40mpg like a mk2 cortina used to?.....
If cars had been developed for MPG instead of BHP (which you can hardly use daily) wouldnt oil reserves lasted longer?
Get the first proper leccy/hydrogen cell cab you can, you could be the only car running the day the oil runs out or hits £10/ltr