After Hours

Photos: Concept cars at Frankfurt show

A reconstructed Audi A3 racecar gets a fill-up of vegetable oil from inventor and engine specialist Hilmar Wolf. Retooled for the fuel by Wolf, the car reportedly packs 191 horsepower and hits a top speed of about 150 mph.

Uli Deck/Deutsche Presse Agentur

By Bill Detwiler

Bill Detwiler is Editor in Chief of TechRepublic and the host of Cracking Open, CNET and TechRepublic's popular online show. Prior to joining TechRepublic in 2000, Bill was an IT manager, database administrator, and desktop support specialist in the ...