What is a dual-clutch transmission (DCT)?

A dual-clutch transmission (or DCT) is a type of automatic gearbox that changes gears incredibly quickly by using two clutches. One clutch will be engage the gear that's driving the car, while the other will be ready and waiting with the next gear. When you change gear, there's a nearly instantaneous changeover between the gears, which means a DCT is much faster at shifting than a normal torque-converter auto. Volkswagen's DSG automatic is a popular brand name for a dual-clutch transmission. The downsides? Well, a DCT gearbox is complicated and expensive to fix if it goes wrong, and they tend to add a premium to the car when you buy it new.