Hybrids are heavier than regular cars. For this reason, Koenigsegg has given up on the gearbox, thus replacing more than half of the hybrid system's mass.
The power of a five‑liter, bi-turbo, eight‑cylinder engine, with 1085 hp in the Regera, is transmitted, through a type of torque converter, directly onto the rear axle, with only one direct gear. Since the engine cannot cope with such a long gear ratio at low RPM (the Regera can achieve 410 km/h), the Regera moves thanks to two electric motors, which power their respective rear wheels. A third electric motor is mounted on the drive shaft and, together, they muster 700 hp. At around 50 km/h, the gas‑powered engine kicks in and, soon after that, the torque converter is locked, and the gas‑powered engine is directly connected to the rear axle. The Regera then has 1,500 hp of system output, and accelerates from 0 to 100 km/h in 2.7 seconds, and reaches its final speed of 410 km/h in 20 seconds.