Aston says One-77 prototype hits 220-mph mark

Aston Martin's One-77 supercar looks fast--and it goes fast.

The British luxury-car maker says a prototype of the One-77 notched 220.007 mph during testing in southern Europe. The speed mark was set in dry and windy conditions.

The One-77 is powered by a 7.3-liter V12. The car's body makes extensive use of carbon fiber and aluminum, which keeps weight down.

Aston plans to start deliveries of the car next summer.

By Dale Jewett