1.   Both the BMW and Nissan car companies have announced prototype electric cars, to add to those already being developed by General Motors, Peugeot and Ford.

2.   There are prototype cars running off hydrogen, as well prototype aeroplanes.

3.   BMW says it has now selected a design and built a prototype car, but it has not shown it yet to people outside the company.

4.   Priddy hires college students to drive her around while she searches for prototype cars, and now chooses students who seem to have sound judgment.

5.   She was hooked and began finding friends to keep watch for camouflaged prototype cars.

6.   These giant computers allow automotive engineers to try a multitude of setups on shocks, springs, alignment settings and aerodynamics without having to build expensive prototype cars.

7.   Honda said it has tested a prototype car with its own engine on a track near Milan, Italy.

8.   The prototype fuel cell car will use a still-developing technology.

9.   At Chrysler, engineers have fitted a prototype car with an on-board conversion-fuel cell system that converts gasoline to hydrogen and promises greater fuel efficiency.

10.   Chrysler engineers have fitted a LHX prototype car with an on-board conversion-fuel cell system that converts gasoline to hydrogen and promises greater fuel efficiency.