The Aprilia GPR 250 does use Rotax engines, as stated by Aprilia themselves. The 250cc, single-cylinder engine is a Rotax-built engine, which is known for its excellent performance and efficiency. The engine is capable of producing 40 horsepower and 27.5 Nm of torque, giving the bike an impressive power-to-weight ratio. The Rotax engine is also one of the most reliable engines among the 250cc class.