The fifth volume of downloadable car pack for Test Drive Unlimited has hit Xbox Live Marketplace, offering up six new vehicles for the game for 350 points. The pack contains five supercars and one motorbike, which are the Chrysler Crossfire SRT6 Coupe, Dodge Charger Super Bee, Ferrari 308 GTS Quattrovalvole, Ferrari 512 TR, Kawasaki Ninja ZX-12R and the Spyker C8 Spyder. Additionally, players can downloadable the Holden Efijy Concept completely free.

“Since launch last year, we’ve been 100% committed to regularly bringing brilliant new content to fans to enrich the Test Drive Unlimited experience and give new and existing fans great reasons to keep the pedal to the metal,” said Mathias Hautefort, Executive Vice President of publishing and production, Atari. “This is the fifth instalment of brand new vehicles for Test Drive Unlimited, and makes this already essential game even more of a must-have for any self-respecting racing fan.”

Four volumes of downloadable car packs were previously released. Details on them can be found after the jump.

Test Drive Unlimited is available now for PC, PS2, PSP and Xbox 360, though only the Microsoft console offers the additional cars.

Test Drive Collection Volume 1 (Nov 2006): RUF RGT, Koenigsegg CCR, Noble M400, Corvette® C6 Convertible, Ferrari 250 GTO 1962, Lamborghini Countach 25th Anniversary Edition, plus free Chevrolet® Corvette® C1 1957 Hardtop and Lexus IS 350;

Test Drive Collection Volume 2 (Dec 2006): Ferrari 612 Scaglietti, McLaren F1 GT, Dodge Viper SRT-10 Coupe, RUF Rt 12, Alfa Brera, 1971 Dodge Challenger RT, Edonis, plus free 1971 Dodge Challenger RT .

Test Drive Collection Volume 3 (Mar 2007): Ferrari F40, Chrysler Crossfire® SRT6 Roadster, RUF Rturbo, Audi S6, Chevrolet® Corvette® Stingray™ Convertible 1971, Mercedes-Benz CLK GTR, plus free Cadillac® CTS-V, Lexus GS 450h hybrid-powered luxury sport sedan and Lexus LS 460 premium luxury sedan.

Test Drive Collection Volume 4 (May 2007): Dino 246 GT, Ferrari Challenge Stradale, Cadillac® Cien™, RUF RK Spyder, Lamborghini Murciélago Roadster, TVR T440R, plus free Saturn™ Curve™.