A91

A91 or A 91 stands for:

• A91 road, a British highway
• A91 (Italy ), an Italian motorway
• Federal Highway 91, a formerly planned German Autobahn
• Dengue fever, ICD-10 code of the disease

A-91 stands for:

• Autovia A-91, a Spanish highway
• KBP A-91, a Russian automatic rifle

• Disambiguation
• Abbreviation