The Talgo cars are designed to passively tilt into curves permitting greater speeds than conventional cars. A typical trainset consists of 12 or 13 cars, one baggage car, two business class coaches, one lounge car, one cafe car or Bistro car, and six or seven coach class coaches. Trainsets without a cab car are paired with a Non Powered Control Unit (NPCU), an older locomotive with no engine used as a cab car.