There are two seater cars driving around minor roads in Spain. They look a bit like a Smart car. Somebody said they only have a 50cc engine. It that enough powe to propel two people?
These cars are found in continental Europe from France to the Iberian peninsula and I think in Italy too. With two seates, they have a small engine, usually two cylinder, capacity is of the order of 400 cm³. They are in a licensing class of their own and people do not require a full driving licence to drive it as their maximum speed is of the order of 45km/h. The Aixam is one example.
Have you ever heard of a Honda 50 .. two seats, two people, lightweight and a 50cc engine ?
It wasn't going to break any records but it still managed to get two people around !
These low-powered vehicles are frequently a pain to other road users as they can be difficult to overtake. They are, however, popular with people who can (no longer) get a full licence, such as the elderly and those who've been banned for a traffic offence. There's an Aixam factory near Annecy in the French Alps but I have no idea how these vehicles manage on mountain roads. The big plus is that they provide a much better form of mobility than the battery-powered buggies that are the best you can get in the UK.