For at least a year, Rotax has been hinting at a new higher horsepower engine and on Tuesday at AirVenture, it delivered. The new, 135-hp turbocharged 915 iS is a follow-up to the 912 iS introduced in 2012. Although the new engine shares similarities with the 912 iS, it has a reinforced crankshaft, newly designed pistons and, of course, a turbocharger. To handle the higher torque, the 915 iS will also feature a new gearbox. Complete dry weight is expected to be about 84 kg or 185 pounds. With a turbocharger compressor ratio of 1 to 3.5, the 915 iS will have a critical altitude of 15,000 feet.
This is a companion discussion topic for the original entry at https://www.avweb.com/ownership/rotax-announces-new-135-hp-turbocharged-engine