- Release dates : 10/11/11 (US), 10/14/11 (EU), 10/20/11 (Rest of the world)
- 500+ Cars
- 80+ Manufacturers
- 16 cars on track
- Monthly DLC : Option to buy cars either in packs or individually in the new in-game marketplace
- Changeable Homespace (aka FM3's career screensaver) and ability to take photo in it
- Active Aero
- Alternate time of day for tracks : Championship race at Suzuka (for example) has one heat starting at noon and, after a small loading , the next one transition to dusk
- Choice of gift cars at new player levels : DLC cars will be integrated into career gift selections
- Badges and titles earned by doing stuff in the game
- Community Car Clubs includes at least car sharing (the shared car can still be used by the one sharing)
- “Reasonably Priced Car” (aka Kia cee’d) is in
- Steering assist can be fully turned off
- Reset assist (only with air driving ?)
- Auto-acceleration assist (only with air driving ?)
- Image-Based Lighting
- No hybrid model for tire simulation anymore, they got all the data they wanted only from Pirelli
- Exchange with Epic about technical stuff
- Licensed distortion effect that should make the sound much better in Forza 4
- Kinect Headtracking
- Kinect Voice : Used to "hyperlink" and move through interface and menus more quickly.
- Kinect air driving (works while players seat)
- World Tour Career Mode : Advance to various venues, each with their own events (race, autocross, drift, track days, time trial events, Top Gear-inspired stunts such as car soccer and cone challenges, etc).
- Autovista mode : can be used with a classic controller, no Kinect required; A selection of cars are highly detailed and can be fully explored (interior, boot, etc…)
- Public lobbies
- Hoppers
- Rivals Mode : Asynchronous play with leaderboards (think "FM Autolog"); bounty rewards for beating rivals. Extends to Career mode as well.
- Two player split screen