If the rover didn't work, Anywho, what were they driving?
While by no means an expert, I do like old school special effects, like stop motion, and stop motion, especially then, looks nothing like the rover moving.
This scene, while effective, highlights a problem, the lack of motion blurring. COmpare that to to the famous
Apollo 16 'Grand Prix'. To my eye, they look nothing alike in technique, the rovers motion being far, far, smoother, yet Clash of the Titans was almost 20 years older.
OK, let's look at another technique, CGI. Even now it would be tricky, but then?
This was at the forefront, the absolute bleeding edge of technology back then. Shading was primitive, textures were unknown, bump mapping, what's that?
So no dice.
Traditional 2D animation, do I even need to give an example?
So, again, if the special effects of the time weren't up for it, you need an actual working 'prop', something that could be driven. So just what were they driving?