( http://www.TFLcar.com ) 305 Horsepower...that's how much power the 2010 Subaru STI puts out to all four wheel at maximum velocity. There can be no doubt that the Subaru STI is one of the fastest production Rally cars you can buy today.. 5 Horsepower...that's how much power U.S. Olympian and triathlete Matt Reed puts out to the rear wheel of his bike on a typical training ride. There can be no doubt that Matt Reed is one of the fastest American triathletes racing today. So which one is faster: the man or the machine?