Peugeot is revising a long-held three-digit naming policy that dates to 1929 and the Peugeot 201. The system traditionally used zero as a central digit, with the first number representing the relative size and segment of the vehicle – with, for instance, a Peugeot 107 being a mini-compact and an 807 being a midsize van – and the last digit indicating the generation of the car.Image galleryGoing forward, the automaker says new models will retain their initial names for the life of the vehicle, with zero remaining as the central number and the first digit continuing to represent relative size and segment.DIGIT EIGHTAbout that last digit: Peugeot says new global models with high volume potential, such as the upcoming 301, will use the number one at the end. It adds: "Designed specifically to fulfil new customer expectations, these new models will offer value for money and status and will supplement the range of models that from now on will remain with the end digit 8."Following these words, the spy shots here show the most clear images yet of the new-generation Peugeot 308. Snapped undergoing cold-weather testing in northern Europe, the car is expected to make its official debut at the Frankfurt motor show in September 2013 or in Geneva in March 2014.While remaining a compact hatchback, the new 308 appears to grow significantly in both, length and width. It’ll also talk the new design language first seen when the 208 was introduced in 2012.There is no confirmation of new engines but it’s expected to see a range of economic four-cylinder petrol and diesel units with outputs between 67kW and 119kW, with the 149kW GTI being the range-topper. Though seen here in five-door hatchback-guise, the second-generation 308 will later come as a three-door, convertible and estate.