After two years of research, Opel and the Institute for Combustion Engines and Motor Vehicles at the University of Stuttgart have developed a CNG-hybrid version of the Opel Astra Caravan.

The Hyundai Tucson drops down a weight class due to its low towing limit, but that’s quite common for plug-in hybrids. Besides, a maximum of 1350kg means a reasonable range of caravans are still ...