Peugeot developed a diesel-electric hybrid version of the Peugeot 307 .....

Peugeot developed a diesel-electric hybrid version of the Peugeot 307 that can reach 80 mpg.It is a 2-door cabriolet and remained a concept, but if it had reached production it would have been one of the more fuel efficient cars available.
Peugeot is a long way off from its ambitious target of selling 4 million units annually by the end of the decade. In 2008 its sales stayed below the 2 million mark. In mid 2009, 'adverse market and industry conditions' were blamed for falls in sales and operating losses. Christian Streiff was replaced by Philippe Varin (CEO) and Jean-Pierre Ploue (Head Design) was transferred from his post at Citroen.