One thousand kilometres from Paris to Geneva was traversed, and all weather conditions were encountered, but the real question is not did they beat the official figures - we always knew they would - it's by how much.
Australia's ADR figure for the 308 1.6 HDi is 4.7-litres/100km. Breaking it down even further, the open-road figure (extra urban) is 4.1L/100km. On the ECO CUP challenge, the best average was just 2.6L/100km.
A staggering result and probably cooler European temperatures helped here, but it shows that hybrids still have a way to go yet when it comes to beating diesel on the open road.
And no, these cars weren't modified in any way. They were straight off the production line.
Peugeot's 3008, which is soon to be launched in Australia, also performed well, sipping 2.97L/100km, which means there's plenty of scope for good fuel consumption with a bit of careful driving.