Giugiaro says the all-wheel-drive, mid-engined car accelerates from zero to 62 miles per hour (100 kilometers per hour) in 4.05 seconds and tops out at 155 miles per hour.
Not really a prius, but The Quaranta borrows its hybrid powertrain from the Toyota Highlander Hybrid and the Lexus RX400h: a 3.3-liter V-6 and the Hybrid Synergy Drive system with a combined output of 268 horsepower and 213 pound-feet of torque. Italdesign claims the car will return a city/highway average of 33 mpg, and a pair of fuel tanks that together hold about sixteen gallons of gasoline provide a 620-mile range. "E-Four" is, in fact, a fancy name for Toyota's part-time all-wheel drive system (called "4WD-i" in the Highlander Hybrid), which uses a separate, 68-horsepower electric motor at the rear wheels that kicks in during acceleration or when slippage is detected.

http://blog.wired.com/cars/2008/02/giugiaro-builds.html