The Audi Q3 is a natural-born fun car to drive, which is somewhat unexpected for a small SUV crossover, even if it is an Audi. There is a palpable driver-machine synergy between steering, suspension set, braking and exhilaration. It is a nimble city runner and a safe commuter with all-wheel drive, eight air bags and supportive safety features. Redesigned last year, the Q3 stands 1.5 inches taller, 3.8 inches longer and nearly an inch wider...