Imagine Miami Vice in Milton Keynes and you've got the idea of Turbo Esprit. As a drugs cop, you've got to race through the 3D streets to intercept the cars of drug peddlers which are converging on an armoured truck. Shoot the crims' hit cars for points but be careful not to injure innocent bystanders, or you incur hefty penalties.
On the Spectrum, the control you have over the car (you can even do three-point turns) and the dark city streets give this game a very realistic atmosphere, and it's really very addictive. Unfortunately the C64 is of nowhere near the same standard - slow, jerky and graphically awful - so best give that one a miss.
Spectrum
A brilliant 3D driving game. Very atmospheric and addictive.