[kach22i]

I'm not an engineer, so I thought I would toss this one out there and let you all chew it up.

Link:
http://www.angellabsllc.com/

I found out about this here:
http://groups.google.com/group/alt.rec.hovercraft/browse_frm/thread/1043a58adde8438d/dd2dbe12a3e8bee5?lnk=raot&hl=en#dd2dbe12a3e8bee5

The MYT engine is the result of a $4 million dollar R&D project undertaken by Angel Labs LLC to build the ultimate internal combusion engine. Inspired by drag racing, inventor Raphial Morgado designed the engine with a focus on power, torque, and fuel-efficiency to meet the hefty demands of the today's automotive applications in a lightweight package. The result was a revolutionary design with a power-to-weight ratio up to 40 to 1, over 3,000 ft/lbs of torque, and a diesel-mode mileage in excess of 150 mpg!

EDIT:
Another interesting engine.

http://www.quasiturbine.com/