This is not a particularly good picture, but it's certainly one you can't take often, for three reasons: First, the Porsche 924 Carrera GT was only built 406 times in 1980, roughly 300 to 350 of these cars do still exist. Secondly, while 75 cars have been manufactured in right hand drive form for the UK (and Australia/Japan/etc.), this one is a left hand driven car with UK number plates. And thirdly, these cars are quite fuel efficient, driven on public roads. You only need to refuel the car every 700 to 900 km.
So the probability that you meet one of these cars at a gas station is really quite low, isn't it?