No ethomaz. Even though the Forza 4 engine is based on the Forza 1 engine, it's not as if Forza 1 was a product of the Forza 4 development. If it were, all the cars, tracks, and features in Forza 1 would have been retained.
GT5 was in development 6 years ago (5 years before release), when PD announced they were developing GT5, and that they would completly rebuild the engine for GT5, throwing away all the data collected between GT1-4 (all cars were re-analyzed). GT5P was a product developed while making GT5, in order to satisfy the fan during the long wait to GT5. Every track and car from GT5P was retained, and well yea.
Even the definition of prologue affirms that it's the introduction to GT5. IMO it was a mass audience test of GT5's engine.
GT4P was released only a month before GT4, do you really think GT4 was entirely developed in 1 month? You're using this same logic for GT5.
What did you undestand for 5 years development before release?
In these five years PD worked in: Tourist Trophy, Gran Turismo HD, Gran Turismo 5 Prologue, Gran Turismo (PSP) and Gran Turismo 5... but forget that let's assume that they worked just in GT5.
GT5 = 5 years and 110 employees
F3 = 2 years and +300 employees
I can't see how people here thinks PD spended more time to develped Gran Turismo 5 than Turn 10 with Forza 3... the time is almost the same if you forgot the PD worked in others four games in parallel.
Or you think Tourist Trophy, Gran Turismo HD, Gran Turismo 5 Prologue and Gran Turismo (PSP) didn't use any bit of time from the development team?
The excuse that the game was in development for five years or more is ridiculous and a myth created by haters.
Polyphony Digital has 140 employees, but how do you know how big turn 10 is? I can't find anything ,can you show me a link?
Gran Turismo HD and Prolgue were released as they worked on GT5. They are projects released to generate hype for GT5, and to give fans a taste of what to expect for GT. The GT HD concept was PD's creation of the GT5 engine in it's earliest form, and GT5P was a progression of development to GT5. Notice that both combined still are not a full game?
Also GT HD concept is only 10 cars, and 1 track, and was given for free in Japan you know? This is far from a full game, more like a demo.
Turist Trophy also released in February 2006. The time between Tourist Trophy's release to GT5 is still almost 5 years (give 3 months).
So really in those 5 years, all PD did was release GT PSP (a game which imported a significant amount of data from GT4), and GT5 along with demo's of working models for GT5.
I'm not a hater, but GT5 was in development for 5 years. Yes they did release GT PSP, but that game was heavily based off GT4 (look at the car library, most cars are 2005 or prior). Also GT PSP was in development since 2004, so it's not as if the entire game was developed when GT5 was in development. I can even find quotes from Polyphony Digital director Kazunori Yamauchi that say GT PSP was delayed so many times due to the longer then expected development time for GT5, and that GT5 was a priority for those years.
Also, just to end this debate Kazunori Yamauchi stated in 2006 that GT5 was given the companies priority. It's been in development 5 years before release, Polyphony Digitals Director himself claims it. I mean Vision Gran Turismo was the original title GT5 was given, and that was in development since it's announcement at E3 2005. This was GT5 in it's earliest developmental form, when it still ran on the GT4 engine.
I'm not hater, I'm just damn impressed at what Forza 3 became. Before GT5 I knew so many people that thought GT5 would be a 10/10 game and blow FM3 out of the water, and it didn't. I'm no hater, GT5 is fun, Forza 3 is just damn impressive.