 This is the first petroleum-electric hybrid vehicle on record.Since sufficiently reliable gears and couplings were not available at the time, he chose to make it a series-hybrid, an arrangement now more common in diesel-electric or turbo-electric railway locomotives than in automobiles.Though over 300 Lohner-Porsche chassis were sold up to 1906, most of them were two-wheel drive; either front- or rear-wheel driven trucks, buses and fire-engines.