top 508Specs for all Peugeot 508. Engine technical specs, power, CO2 emissions, mpg fuel consumption, top speed, 0 to 60 mph, dimensions, tires size, weht ... Choose a PeugeotThe 508 sits on Stellantis’ EMP2 platform, as used by countless bgish Peugeots, Citroens, DSs and Vauxhalls. It's relatively lht for its size, but doesn't feel fragile or floppy.