Roots compressor


Cars & Driving

  • noun a typical lobe-type positive displacement compressor; uses two two-lobed or three-lobed internal rotors phased to prevent clashing of the lobes by gears; normally driven from the crankshaft by toothed or V-belts, can achieve speeds up to 10,000 rpm; provides low-end torque and boost without lag but is less fuel-efficient than a turbocharger