Rovers are a class of electric vehicles that people drive around inside the Centauri Princess.
They have a super- aerodynamic design, are convertible, with a removable leather roof and have four-wheel drive capability for speeding along the highways as well as across the pine forests when people get bored. They run on an advanced form of fuel cell technology and have autonomous self-driving capability, leaving the driver with the option of having a leisurely chauffer-driven ride if he/she so chooses.
It is conventional in the exotic culture inside this miniature world drifting in the vast eternity of the forever, for people to give pet names to their luxurious vehicles. For example, Zakarov's rover is known to him as 'Betty' and Sharuk's one is known to him (and all his ever changing girlfriends!) as the 'Corvette'.