As we all know, Diamond went with the diesel, the Thielert Centurion 1.7 liter, a Mercedes conversion done up for aviation use by German company Thielert Aircraft Engines. While the Lycoming was well-known and trusted, the Thielert engine had some irresistible advantages. Despite the fact that it was only a 135 hp engine, compared with 180 hp for the Lycoming, the German diesel was, well, a diesel. And because it burned jet fuel, it could be fueled just about anywhere and, in many parts of the world, for far cheaper than airplanes requiring 100LL. And because it was an engine designed to be computer-controlled on the Mercedes sedans into which it was intended to go, computerized engine control, “fadec” in aviation parlance, was a natural, as well. So pilots would get a number of pluses: easy starting, no-brainer engine management and silky smooth power across the curve.