Additionally the ALP-vehicle is equipped with a longer final drive, lowered friction speed of the centrifugal clutch and modified variomatic transmission character to realize a real down speeding engine behavior. The engine works with stoichiometric air fuel mixture (AFR = 14,7) in all mapping points without thermal overstress. Especially under full load there is a large potential for fuel savings (and emissions) as visible in the subsequent diagram. For this comparative measurement the vehicle was driven on the roller performance tester under real conditions at constant velocities along the tractive resistance line.
The fuel consumption was tested in the field, consisting of 1/3 urban and 2/3 country roads. The ALP Liberty consumed 2,25 Lit/100km (44,5 km /Lit), where as the factory Liberty 2,7 Lit/100km (37km/Lit) required. The fuel savings are 17%!