Laser powered cars

[Brogan]

Well, not quite

But laser spark plugs at least.

http://www.bbc.co.uk/news/science-environment-13160950

I wonder if it will ever make it to market and what the cost will be.
Let's face it, spark plugs are extremely cheap to make but if the efficiency savings are high enough then I guess there's a chance.

 

[Grizzly]

Interesting idea. Combine them with direct injection and they could be quite a step.