The demo features the fictional Bernese Alps track, and stars the 2011 Ferrari 599 GTO, 2011 Subaru WRX STI, 1970 Mercury Cougar Eliminator and Top Gear's Reasonably Priced Car the Kia cee'd. That's a decent selection of high and low-powered roadsters.
Forza 4's Rivals mode, an asynchronous multiplayer component comparable to Need for Speed's Autolog, has also made the cut. Beat a Friend's lap time and you'll unlock an in-game reward.
Turn 10 has also announced a Muscle Car DLC pack, free to preordering players