- autovista: 26 fully interactive 1m poly models
single player
- 12 cars on track.
- Improved AI
- slower cpu drivers are only slower through corners, less brave, but still go full speed on straights, which means cars won't be miles apart after one lap.
- one additional difficulty level
- cpu will upgrade their cars
- more variety in career, with overtaking, autocross, bowling (?) and other types of events.
- affinity system. Discounts and free upgrades for your car eventually
- reworked physics and tire physics
- no steering assist on countersteering, resulting in tankslapping
- better damage system, with more polygonal deformation, more localised damage
- if you flip your car, race is over.
- headtracking with kinect
- several (or 'some', or a 'small selection') of tracks available at different times of the day
- around 100 new cars, plus all the cars from Fm3 ultimate.
- Porsche cars are gone and so are around 35 cars from fm3.
- Rally di Positano, New York and Sidewinder gone.
- 5 environments were added, several returning tracks revamped, updated etc.
- better DLC integration (?)
upgrading
- ability to delete bumpers and factory spoilers on some cars
- aero upgrades more in line with the car's period
- headlights covers (which you can paint)
- Full OEM makeover packages for some of the cars.
- widebody kits ?
graphics
- IBL
- reworked shaders for all materials
- adjusted cockpit view, which is now more dynamic
- full lod models used ingame in some cases
- more abundant and persistent smoke/dust
sound
- PGR series guy working on it
- Cars sound different when under stress, like when hill climbing
- Improved tire squeals sounds ?
multiplayer
- 16 players races
- public lobbies
- car clubs, sharing cars, setups, designs.
additional stuff
- much lower comression ratio for 720p photo mode, ability to take 2160p uncompressed pictures
- new photomode ******s (vignette etc)
- 6 homespace locations
حالا معلوم نیست میخوان چه سوژه جدیدی برای خندیدن به بازی پیدا کنن ! 
ولی خب مهارت بالایی در این امر دارن و در نهایت ما رو غافلگیر میکنن ! :-b
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