ok maybe i'm a bit harsh and should offer a more responsible post.
at night, you should increase the ISO as high as u can without introducing too much noise. but noise is better than blur, so use high ISO if u must
try and keep the camera level with the horizon so it doesn't look like u've got one short leg
longer shutter times to expose the picture correctly, without blowing out the highlights
use larger aperture or tripod to try and get rid of hand shake blur
try and play with the rule of thirds to balance your picture correctly
and try using fill flash or a rear curtain type flash to light up the car in the foreground when exposing for the background.
for closer car shots use a larger aperture to try and blur out the background to maintain focus on the car.
hope that helps
