It’s all show and no go, but if it could, boy the Saab Aero X Concept sure would fly. The carbon fiber body sits atop an all-wheel-drive setup and is built for speed. The two-seater has a 2.8-liter, 400-horsepower, twin-turbo V6 engine designed to burn ethanol, mated to a seven-speed manual transmission. Considering the work done on ethanol engines, and the recent trend toward turbocharged and direct injection engines (BMW and Mercedes brought out new engines at the Geneva Auto Show), some of the powertrain details could be brought forward and applied to the upcoming 2008 Saab 9-3. We’ll have to wait and see. But for now, according to Saab, a computer simulation had the Aero X Concept going 0-60 in 4.9 seconds, and reaching a top speed of 155 mph. Torque registers at 369 lb.-ft between 2,000 and 5,000 rpm.