The Opel Flextreme shares the same GM E-Flex platform as the Chevrolet Volt (front engine, four door).

It is based on the same GM E-Flex series hybrid platform used in the Chevrolet Volt,[1] but using a diesel rather than gasoline engine.

The Opel Flextreme is a small family car with a 5-door hatchback body styling with 5 seats.

In January 2008, a rebadged version of the concept was introduced at the North American International Auto Show as the Saturn Flextreme.

[3] The Opel Flextreme is expected to emit 40 grams of CO2 per km or less (according to European test procedure ECE R101 for range extender vehicles).