Engines

479cc (66x70mm) two cylinder air cooled with 13bhp @ 4000rpm (later 15bhp)
499.5cc (67.4x70mm) with 17.5bhp @ 4400rpm or 18bhp @ 4600rpm or 21.5bhp

Suspension

front : Independent, single upper wishbone with telescopic damper and single transverse leaf spring
rear :  independent with telescopic dampers and coil springs
wheelbase : 1840mm
front track : 1121mm
rear track : 1135mm (Giardiniera : 1131mm)

Brakes

front : drums
rear : drums
handbrake operating on the rear via a cable

Gearbox

4 speed manual
cable operated clutch

Steering

worm and sector

Kerb weight

original : 470kg
Giardiniera : 555kg
500D : 500kg
500F : 520kg