The UK launch date of the next PGR chapter is now confirmed as October 12th with a suggested retail price of £44.99. Also revealed today are some of the vehicles included in the game, I imagine there's many more than this though.

PGR4 shows off an all-new career mode, dynamic weather system and PGR On Demand. The game will also feature some exotic locations, including St. Petersburg, Shanghai, and Macau, plus a revised kudos system.

Cars:
• Ariel Atom 300 Supercharged 2004
• Aston Martin V8 Vantage 2005
• Austin Mini Cooper S 1964
• Chevrolet Camaro Z28 1969
• Ferrari F430 2004
• Caparo T1 2007
• Caterham R500 2000
• Lamborghini Gallardo 2004
• Mercedes-Benz SLR McLaren 2005
• Tesla Roadster 2008

Motorcycles:
• BMW F 800 S 2006
• Honda NR750 1992
• Honda CBR600RR 2005
• Kawasaki Ninja ZX-14 2007
• MTT Turbine Superbike 2006
• MV Agusta F4 Senna 2006
• Norton 500 Manx 1962
• Triumph Speed Triple 2005
• Triumph Trident 2005

These Project Gotham Racing 4 screenshots show off some of those vehicles.