The BMW Z4 is a small two-seat sports car, with a traditional roadster layout combining a front-engine, rear-wheel-drive configuration, a long good, and a low seating position just ahead of the rear wheels. Major competitors include the Audi TT, Mazda MX-5 Miata, Mercedes-Benz SLK, Nissan 350Z/370Z Convertible, and Porsche Boxster. It's always...

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