Are the cars with the stop-start facility worth having?
They do save a very small amount of fuel of course and help the environment in a very small way, but, did you know that the car battery will cost 2 to 3 times as much to replace for this dubious advantage?
The starter motor will take quite a bit of a pounding aswell.
They are very annoying to drive. I've had hire cars with this feature. The company said that drivers kept reporting it as a fault, but, anyway, it's very eerie and not immediately apparent what pedal to press to start up again or stop it.
The Audi version claims to save 0.2 l/100 km in diesel during the combined cycle.
I rough that out to around £60 per annum assuming 12,000 miles per year. Not enough to pay for batteries and starter motors if they need replacing more frequently than with normal cars.