The roadster has a top speed of 210 kph (130 mph) and does 0 to 100 km/h (62 mph) in 6.5 seconds. It has a 4-cylinder, 1.6-liter turbocharged engine, 6-speed manual transmission and a maximum output of 110 kW (150 hp) at 5,600 rpm, with maximum torque of 210 Nm (155 lb-ft) at 2,300 rpm. As for fuel economy, it gets 6.7 liters gasoline equivalent/100 km, or 35 miles per US gallon and has a range of 450 kilometers (280 miles).
But who cares about fuel economy with a beauty like that, huh? There is a video below about what looks to be the classic version of the PGO Cévennes. I can't tell: The entire thing is in French. Still worth a watch for any roadster fan.
[Source: Treehugger, Green Car Congress, YouTube]