As I was reading your question, I immediately thought,
"Well
Zoe would definitely drive a convertible VW Bug, with a hot pink flower in the dash vase, and sporty, yet high-fashion shades", only to see that Pfeiffer would drive the same. Ah well...they could wave at each other as they pass on the road
Cooper would drive a Red Mini Cooper (after which he was named), of course.
Emma would never expend the energy necessary to go anywhere, much less drive herself.
Cindy would drive a Prius...smart, practical, earth-friendly because she's always thinking of others. All about quality versus flash.