Last week, I spent four days in a 2.0-litre Mazda MX-5. It’s very good, but it got me thinking – why are there no fully electric models in this class?

Let me explain. Like a fast-growing percentage of the world’s population, the vast majority of my weekly journeys are in city streets and on motorways - scenarios in which the MX-5’s engine is rather quiet.

It only becomes aurally engaging when worked hard. In all other circumstances, wind and road noise dominate the sound waves that surround the little Mazda, as they often do in non-premium convertible sports cars.

That’s why I think it might as well be electric.

Don’t get me wrong, when venturing onto B-roads, the pleasing tone of a sweet combustion engine can’t be beaten, but unless it’s something very highly strung or endowed with six or more cylinders, I’d argue the loss of sound isn’t that great.

And anyway, some people don’t buy sports cars to attack country lanes, they buy them to enjoy the sun and trundle through town in. For those people – and I must admit I’d be one of them during the working week – an all-electric sports car would be perfect. Zero-emissions drop-top motoring in a lightweight two-seater would have no impact on local air pollution, and would still be fun.