The Hybrid Air, which combines hydraulic drive with a conventional gasoline engine, is an experimental vehicle that PSA Peugeot Citroën says is an exemplar of energy efficiency. Compressing Gas for a Cheaper, Simpler Hybrid
The Hybrid Air, which combines hydraulic drive with a conventional gasoline engine, is an experimental vehicle that PSA Peugeot Citroën says is an exemplar of energy efficiency.