Toyota Motor plans to double the number of models that use hybrid engines to six by about 2006, including sport-utility vehicles, company president Fujio Cho said, according to Bloomberg News. Toyota, which has sold 140,000 cars with engines driven by a combination of petrol and electricity since 1997, plans to release a larger, faster and cleaner version of the Prius hatchback later this year. "We will release hybrid sport-utility vehicles in the next two to three years," Cho told Bloomberg News in a television interview at Toyota's fifth environmental forum in Tokyo.