Audi A4
The Audi A4 holds the distinction of single-handedly reviving the Audi brand after its big sales slump some two decades ago. Launched in the mid-'90s, the A4 quickly proved a favorite among luxury-car buyers thanks to its handsome, well-finished cabin, sharp handling and available Quattro all-wheel drive. A4 remains a solid choice in the entry-level luxury car segment.