Kaj pomeni oznaka 16v na zadku avtomobila?

motor, 16V, motorna glava, ventili, VW motor, 16V, motorna glava, ventili,
motor, 16V, motorna glava, ventili, VW motor, 16V, motorna glava, ventili,
motor, 16V, motorna glava, ventili, Škoda motor, 16V, motorna glava, ventili,
motor, 16V, motorna glava, ventili, Škoda motor, 16V, motorna glava, ventili,
motor, 16V, motorna glava, ventili, Daimler motor, 16V, motorna glava, ventili,
motor, 16V, motorna glava, ventili, Volvo motor, 16V, motorna glava, ventili,
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