Quadricycle refers to vehicles with four wheels.

In 1896 Henry Ford named his first vehicle design the "Quadricycle". it ran on four bicycle wheels, with an engine driving the back wheels.

In 21st century France, a quadricycle is a 4-wheel car that cannot go faster than 45 km/h (28 mph), weighs less than 425 kg (937 lb), and has a maximum power of 4 kW (5.4 hp). In the United States, a similar classification is the low-speed vehicle class.

• Ford Quadricycle, Henry Ford's first design
• Burnard Jarstfer Quadricycle (replica based on Ford Quadricycle)
• Orient Quadricycle (aka Orient Autogo)
• Truffault Quadricycle
• Le Rudge Quadricycle Tandem
• De Dion Bouton 1900 Quadricycle
• De Dion Bouton Victoria Quadricycle
• De Dion Bouton "La Marquise" Quadricycle (Steam runabout)
• Peugeot Type 3 Quadricycle
• 1889 Daimler Quadricycle

Additional motorized four-wheelers:

• Duryea Motor Wagon
• Benz Velo

Quadricycle, quadracycle, quadcycle, quadrocycle and quad all refer to vehicles with four wheels. More specifically these terms may refer to:

• All-terrain vehicle, also known as quad or quad bike
• Automobile, the first experimental steam automobiles were termed steam quadricycles
• Low-speed vehicle, referred to in some countries as a quadricycle
• Quadricycle, European classifications for light four-wheeled motorized vehicles: light quadricycles, category L6e, and (heavy) quadricycles, category L7e
• Quadracycle, a four-wheeled style of cycle
• Velomobile, an enclosed human-powered vehicle