Oldsmobile O4

The Oldsmobile O4 was a front wheel drive concept car that Oldsmobile designed in 2001, a four door convertible aimed at younger buyers that previewed features of the next generation Alero. Many of its mechanical parts came from the Opel Astra, and a four cylinder engine of 190 horsepower drove it with a manual gearbox. The roof had twin carbon fibre targa tops that stowed behind the rear seats, the rear window retracted into a compartment, and the rear doors were small suicide doors. An info ring replaced the usual instrument cluster, took its idea from the Palm Pilot and used ten switches, with media stored on a Sony memory stick, and the car had OnStar. The O stood for oxygen and the 4 for the seating capacity. General Motors announced the end of the Oldsmobile brand weeks before the unveiling, so the car was shown as the GM O4.