Your A to Z of motoring gobbledygook
Gearbox
Most cars have the choice of a manual or an automatic gearbox. The former gives you more control, while an automatic gearbox, which changes gear for you, will be popular with those who want an easier drive.
GPS
Short for Global Positioning System. Or, in other words, satellite navigation (SATNAV)
Grooves
Lateral - drains water to sides of the tyre. Circumferential - evacuates water to the rear of the tyre or "stores" it. The number of grooves increases as the tyre width increases.



