To give you an idea of what the Exobusa feels like, here are some comparative power to weight ratios:

Lotus 2-Eleven - (382)
Lamborghini Murchialago LP640 - (385)
Lamborghini Diablo GT - (392)
Ascari KZ1 - (406)
Caterham 7 R400 Superlight - (420)
Ferrari F50 - (424)

The Exobusa delivers 430bhp/tonne