Polyphony Digital who develops Gran Turismo has released the facts and figures about the whole series of Gran Turismo games.

Last May Sony announced that its Gran Turismo racing series had notched up 50 million sales across all PlayStation formats (except PSP though) in ten years and precisely four months.

Eight months later and the series, that now includes a PSP version, is still going strong despite the no-show of GT5.

Here’s the top line from Polyphony Digital (as of Dec ’09):

Worldwide Title Units (K) = Total = 55,450
Gran Turismo 10,850
Gran Turismo 2 9,370
Gran Turismo 3 A-spec 14,890
Gran Turismo Concept Series 1,560
Gran Turismo 4 “Prologue” 1,350
Gran Turismo 4 10,980
Gran Turismo 5 “Prologue” 4,650
Gran Turismo PSP 1,800