http://westfield-world.com/power-to-weight.htmlBased on 1330KG, 320bhp, that's
240bhp per tonne (about 226 with 80kg driver)
Some comparisons:
Nissan 300ZX - (180)
Mitsubishi Evo VIII - (199)
Audi RS2 - (201)
Subaru Impreza WRX STi - (207)
Vauxhall VX220 Turbo - (215)
Lotus Elise R - (223)
Jaguar XKR R - (234)
Maserati 3200GT - (237)
Lotus Exige (S1) - (247)
Mercedes CLS55 AMG - (252)
Aston Martin DB9 Volante - (260)
Porsche 911 GT3 (996) mk1 - (271)